diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..ebc6d86
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,8 @@
+module.exports = {
+  extends: ["plugin:@einride/default"],
+  rules: {
+    "jest/no-deprecated-functions": "off", // we're not using Jest
+    "prettier/prettier": "off", // we're not concerned with code style
+    "@typescript-eslint/ban-ts-comment": "off", // we need ts comment in generated files to disable type checking of files for consumers
+  },
+};
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f668a99
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.idea
+.vscode
+.semrel
+.generated-go-semantic-release-changelog.md
diff --git a/.goreleaser.yml b/.goreleaser.yml
new file mode 100644
index 0000000..b644110
--- /dev/null
+++ b/.goreleaser.yml
@@ -0,0 +1,25 @@
+before:
+  hooks:
+    - go mod download
+
+builds:
+  - id: protoc-gen-typescript-http
+    binary: protoc-gen-typescript-http
+    dir: .
+    main: main.go
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+
+checksum:
+  name_template: "checksums.txt"
+
+snapshot:
+  name_template: "{{ .Tag }}-next"
+
+release:
+  github:
+  prerelease: auto
diff --git a/.sage/einrideeslint.go b/.sage/einrideeslint.go
new file mode 100644
index 0000000..ca4c423
--- /dev/null
+++ b/.sage/einrideeslint.go
@@ -0,0 +1,62 @@
+package main
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	"go.einride.tech/sage/sg"
+	"go.einride.tech/sage/sgtool"
+)
+
+const (
+	name               = "eslint"
+	packageJSONContent = `{
+  "dependencies": {
+    "@einride/eslint-plugin": "4.2.0",
+    "eslint": "8.5.0"
+  }
+}`
+)
+
+func eslintCommand(ctx context.Context, args ...string) *exec.Cmd {
+	sg.Deps(ctx, prepareEslintCommand)
+	// eslint plugins should be resolved from the tool dir
+	defaultArgs := []string{
+		"--resolve-plugins-relative-to",
+		sg.FromToolsDir(name),
+	}
+	cmd := sg.Command(ctx, sg.FromBinDir(name), append(defaultArgs, args...)...)
+	return cmd
+}
+
+func prepareEslintCommand(ctx context.Context) error {
+	toolDir := sg.FromToolsDir(name)
+	binary := filepath.Join(toolDir, "node_modules", ".bin", name)
+	packageJSON := filepath.Join(toolDir, "package.json")
+	if err := os.MkdirAll(toolDir, 0o755); err != nil {
+		return err
+	}
+	if err := os.WriteFile(packageJSON, []byte(packageJSONContent), 0o600); err != nil {
+		return err
+	}
+	sg.Logger(ctx).Println("installing packages...")
+	if err := sg.Command(
+		ctx,
+		"npm",
+		"--silent",
+		"install",
+		"--prefix",
+		toolDir,
+		"--no-save",
+		"--no-audit",
+		"--ignore-script",
+	).Run(); err != nil {
+		return err
+	}
+	if _, err := sgtool.CreateSymlink(binary); err != nil {
+		return err
+	}
+	return nil
+}
diff --git a/.sage/go.mod b/.sage/go.mod
new file mode 100644
index 0000000..6821ad1
--- /dev/null
+++ b/.sage/go.mod
@@ -0,0 +1,5 @@
+module sage
+
+go 1.22
+
+require go.einride.tech/sage v0.334.0
diff --git a/.sage/go.sum b/.sage/go.sum
new file mode 100644
index 0000000..f1adae2
--- /dev/null
+++ b/.sage/go.sum
@@ -0,0 +1,2 @@
+go.einride.tech/sage v0.334.0 h1:HY/u8jM2UQ/BerH+vk7JtXf2hg6J0z99Fh0YAQ4QeaE=
+go.einride.tech/sage v0.334.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=
diff --git a/.sage/main.go b/.sage/main.go
new file mode 100644
index 0000000..757ad6e
--- /dev/null
+++ b/.sage/main.go
@@ -0,0 +1,121 @@
+package main
+
+import (
+	"context"
+
+	"go.einride.tech/sage/sg"
+	"go.einride.tech/sage/tools/sgconvco"
+	"go.einride.tech/sage/tools/sggit"
+	"go.einride.tech/sage/tools/sggo"
+	"go.einride.tech/sage/tools/sggolangcilint"
+	"go.einride.tech/sage/tools/sggoreleaser"
+	"go.einride.tech/sage/tools/sggosemanticrelease"
+	"go.einride.tech/sage/tools/sgmdformat"
+	"go.einride.tech/sage/tools/sgyamlfmt"
+)
+
+func main() {
+	sg.GenerateMakefiles(
+		sg.Makefile{
+			Path:          sg.FromGitRoot("Makefile"),
+			DefaultTarget: All,
+		},
+		sg.Makefile{
+			Namespace:     Proto{},
+			DefaultTarget: Proto.All,
+			Path:          sg.FromGitRoot("examples", "proto", "Makefile"),
+		},
+	)
+}
+
+func All(ctx context.Context) error {
+	sg.Deps(ctx, ConvcoCheck, GoLint, GoTest, FormatMarkdown, FormatYAML)
+	sg.SerialDeps(ctx, Proto.All, TypescriptLint)
+	sg.SerialDeps(ctx, GoModTidy, GitVerifyNoDiff)
+	return nil
+}
+
+func FormatYAML(ctx context.Context) error {
+	sg.Logger(ctx).Println("formatting YAML files...")
+	return sgyamlfmt.Run(ctx)
+}
+
+func GoModTidy(ctx context.Context) error {
+	sg.Logger(ctx).Println("tidying Go module files...")
+	return sg.Command(ctx, "go", "mod", "tidy", "-v").Run()
+}
+
+func GoTest(ctx context.Context) error {
+	sg.Logger(ctx).Println("running Go tests...")
+	return sggo.TestCommand(ctx).Run()
+}
+
+func GoLint(ctx context.Context) error {
+	sg.Logger(ctx).Println("linting Go files...")
+	return sggolangcilint.Run(ctx)
+}
+
+func GoLintFix(ctx context.Context) error {
+	sg.Logger(ctx).Println("fixing Go files...")
+	return sggolangcilint.Fix(ctx)
+}
+
+func FormatMarkdown(ctx context.Context) error {
+	sg.Logger(ctx).Println("formatting Markdown files...")
+	return sgmdformat.Command(ctx).Run()
+}
+
+func ConvcoCheck(ctx context.Context) error {
+	sg.Logger(ctx).Println("checking git commits...")
+	return sgconvco.Command(ctx, "check", "origin/master..HEAD").Run()
+}
+
+func GitVerifyNoDiff(ctx context.Context) error {
+	sg.Logger(ctx).Println("verifying that git has no diff...")
+	return sggit.VerifyNoDiff(ctx)
+}
+
+func TypescriptLint(ctx context.Context) error {
+	sg.Logger(ctx).Println("linting typescript files...")
+	return eslintCommand(
+		ctx,
+		"--config",
+		sg.FromGitRoot(".eslintrc.js"),
+		"--quiet",
+		"examples/proto/gen/typescript/**/*.ts",
+	).Run()
+}
+
+func SemanticRelease(ctx context.Context, repo string, dry bool) error {
+	sg.Logger(ctx).Println("triggering release...")
+	args := []string{
+		"--allow-initial-development-versions",
+		"--allow-no-changes",
+		"--ci-condition=default",
+		"--provider=github",
+		"--provider-opt=slug=" + repo,
+	}
+	if dry {
+		args = append(args, "--dry")
+	}
+	return sggosemanticrelease.Command(ctx, args...).Run()
+}
+
+func GoReleaser(ctx context.Context, snapshot bool) error {
+	sg.Logger(ctx).Println("building Go binary releases...")
+	if err := sggit.Command(ctx, "fetch", "--force", "--tags").Run(); err != nil {
+		return err
+	}
+	args := []string{
+		"release",
+		"--clean",
+	}
+	if len(sggit.Tags(ctx)) == 0 && !snapshot {
+		sg.Logger(ctx).Printf("no git tag found for %s, forcing snapshot mode", sggit.ShortSHA(ctx))
+		snapshot = true
+	}
+	if snapshot {
+		args = append(args, "--snapshot")
+	}
+	return sggoreleaser.Command(ctx, args...).Run()
+}
diff --git a/.sage/proto.go b/.sage/proto.go
new file mode 100644
index 0000000..0cb9d4e
--- /dev/null
+++ b/.sage/proto.go
@@ -0,0 +1,56 @@
+package main
+
+import (
+	"context"
+
+	"go.einride.tech/sage/sg"
+	"go.einride.tech/sage/tools/sgbuf"
+)
+
+type Proto sg.Namespace
+
+func (Proto) All(ctx context.Context) error {
+	sg.SerialDeps(ctx, Proto.Build)
+	sg.Deps(ctx, Proto.BufLint, Proto.BufFormat, Proto.BufGenerate)
+	return nil
+}
+
+func (Proto) Build(ctx context.Context) error {
+	sg.Logger(ctx).Println("installing binary...")
+	return sg.Command(
+		ctx,
+		"go",
+		"build",
+		"-o",
+		sg.FromBinDir("protoc-gen-typescript-http"),
+		".",
+	).Run()
+}
+
+func (Proto) BufLint(ctx context.Context) error {
+	sg.Logger(ctx).Println("linting proto files...")
+	cmd := sgbuf.Command(ctx, "lint")
+	cmd.Dir = sg.FromGitRoot("examples", "proto")
+	return cmd.Run()
+}
+
+func (Proto) BufFormat(ctx context.Context) error {
+	sg.Logger(ctx).Println("formatting proto files...")
+	cmd := sgbuf.Command(ctx, "format", "--write")
+	cmd.Dir = sg.FromGitRoot("examples", "proto")
+	return cmd.Run()
+}
+
+func (Proto) BufGenerate(ctx context.Context) error {
+	sg.Logger(ctx).Println("generating from proto files...")
+	cmd := sgbuf.Command(
+		ctx,
+		"generate",
+		"--template",
+		"buf.gen.yaml",
+		"--path",
+		"einride",
+	)
+	cmd.Dir = sg.FromGitRoot("examples", "proto")
+	return cmd.Run()
+}
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..a8f4ccb
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+- Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+- The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+open-source@einride.tech.
+
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the
+[Contributor Covenant](https://www.contributor-covenant.org), version 2.0,
+available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder](https://github.com/mozilla/diversity).
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..f99e5fd
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+Copyright 2020 Einride AB
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1e9179e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,105 @@
+# Code generated by go.einride.tech/sage. DO NOT EDIT.
+# To learn more, see .sage/main.go and https://github.com/einride/sage.
+
+.DEFAULT_GOAL := all
+
+cwd := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+sagefile := $(abspath $(cwd)/.sage/bin/sagefile)
+
+# Setup Go.
+go := $(shell command -v go 2>/dev/null)
+export GOWORK ?= off
+ifndef go
+SAGE_GO_VERSION ?= 1.20.2
+export GOROOT := $(abspath $(cwd)/.sage/tools/go/$(SAGE_GO_VERSION)/go)
+export PATH := $(PATH):$(GOROOT)/bin
+go := $(GOROOT)/bin/go
+os := $(shell uname | tr '[:upper:]' '[:lower:]')
+arch := $(shell uname -m)
+ifeq ($(arch),x86_64)
+arch := amd64
+endif
+$(go):
+	$(info installing Go $(SAGE_GO_VERSION)...)
+	@mkdir -p $(dir $(GOROOT))
+	@curl -sSL https://go.dev/dl/go$(SAGE_GO_VERSION).$(os)-$(arch).tar.gz | tar xz -C $(dir $(GOROOT))
+	@touch $(GOROOT)/go.mod
+	@chmod +x $(go)
+endif
+
+.PHONY: $(sagefile)
+$(sagefile): $(go)
+	@cd .sage && $(go) mod tidy && $(go) run .
+
+.PHONY: sage
+sage:
+	@$(MAKE) $(sagefile)
+
+.PHONY: update-sage
+update-sage: $(go)
+	@cd .sage && $(go) get -d go.einride.tech/sage@latest && $(go) mod tidy && $(go) run .
+
+.PHONY: clean-sage
+clean-sage:
+	@git clean -fdx .sage/tools .sage/bin .sage/build
+
+.PHONY: all
+all: $(sagefile)
+	@$(sagefile) All
+
+.PHONY: convco-check
+convco-check: $(sagefile)
+	@$(sagefile) ConvcoCheck
+
+.PHONY: format-markdown
+format-markdown: $(sagefile)
+	@$(sagefile) FormatMarkdown
+
+.PHONY: format-yaml
+format-yaml: $(sagefile)
+	@$(sagefile) FormatYAML
+
+.PHONY: git-verify-no-diff
+git-verify-no-diff: $(sagefile)
+	@$(sagefile) GitVerifyNoDiff
+
+.PHONY: go-lint
+go-lint: $(sagefile)
+	@$(sagefile) GoLint
+
+.PHONY: go-lint-fix
+go-lint-fix: $(sagefile)
+	@$(sagefile) GoLintFix
+
+.PHONY: go-mod-tidy
+go-mod-tidy: $(sagefile)
+	@$(sagefile) GoModTidy
+
+.PHONY: go-releaser
+go-releaser: $(sagefile)
+ifndef snapshot
+	 $(error missing argument snapshot="...")
+endif
+	@$(sagefile) GoReleaser "$(snapshot)"
+
+.PHONY: go-test
+go-test: $(sagefile)
+	@$(sagefile) GoTest
+
+.PHONY: semantic-release
+semantic-release: $(sagefile)
+ifndef repo
+	 $(error missing argument repo="...")
+endif
+ifndef dry
+	 $(error missing argument dry="...")
+endif
+	@$(sagefile) SemanticRelease "$(repo)" "$(dry)"
+
+.PHONY: typescript-lint
+typescript-lint: $(sagefile)
+	@$(sagefile) TypescriptLint
+
+.PHONY: proto
+proto:
+	$(MAKE) -C examples/proto -f Makefile
diff --git a/README.md b/README.md
index afa826e..b0f80a9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,54 @@
-# protoc-gen-ts
+# protoc-gen-typescript-http
 
-protoc generate typescript by http
\ No newline at end of file
+Generates Typescript types and service clients from protobuf definitions
+annotated with
+[http rules](https://github.com/googleapis/googleapis/blob/master/google/api/http.proto).
+The generated types follow the
+[canonical JSON encoding](https://developers.google.com/protocol-buffers/docs/proto3#json).
+
+**Experimental**: This library is under active development and breaking changes
+to config files, APIs and generated code are expected between releases.
+
+## Using the plugin
+
+For examples of correctly annotated protobuf defintions and the generated code,
+look at [examples](./examples).
+
+### Install the plugin
+
+```bash
+go get git.apinb.com/bsm-tools/protoc-gen-ts
+```
+
+Or download a prebuilt binary from [releases](./releases).
+
+### Invocation
+
+```bash
+protoc 
+  --typescript-http_out [OUTPUT DIR] \
+  [.proto files ...]
+```
+
+______________________________________________________________________
+
+The generated clients can be used with any HTTP client that returns a Promise
+containing JSON data.
+
+```typescript
+const rootUrl = "...";
+
+type Request = {
+  path: string,
+  method: string,
+  body: string | null
+}
+
+function fetchRequestHandler({path, method, body}: Request) {
+  return fetch(rootUrl + path, {method, body}).then(response => response.json())
+}
+
+export function siteClient() {
+  return createShipperServiceClient(fetchRequestHandler);
+}
+```
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..cb13c98
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,41 @@
+# Security Policy
+
+Einride welcomes feedback from security researchers and the general public to
+help improve our security. If you believe you have discovered a vulnerability,
+privacy issue, exposed data, or other security issues in relation to this
+project, we want to hear from you. This policy outlines steps for reporting
+security issues to us, what we expect, and what you can expect from us.
+
+## Supported versions
+
+We release patches for security issues according to semantic versioning. This
+project is currently unstable (v0.x) and only the latest version will receive
+security patches.
+
+## Reporting a vulnerability
+
+Please do not report security vulnerabilities through public issues,
+discussions, or change requests.
+
+Please report security issues via [oss-security@einride.tech][email]. Provide
+all relevant information, including steps to reproduce the issue, any affected
+versions, and known mitigations. The more details you provide, the easier it
+will be for us to triage and fix the issue. You will receive a response from us
+within 2 business days. If the issue is confirmed, a patch will be released as
+soon as possible.
+
+For more information, or security issues not relating to open source code,
+please consult our [Vulnerability Disclosure Policy][vdp].
+
+## Preferred languages
+
+English is our preferred language of communication.
+
+## Contributions and recognition
+
+We appreciate every contribution and will do our best to publicly
+[acknowledge][acknowledgments] your contributions.
+
+[acknowledgments]: https://einride.tech/security-acknowledgments.txt
+[email]: mailto:oss-security@einride.tech
+[vdp]: https://www.einride.tech/vulnerability-disclosure-policy
diff --git a/examples/proto/.gitignore b/examples/proto/.gitignore
new file mode 100644
index 0000000..cb93f36
--- /dev/null
+++ b/examples/proto/.gitignore
@@ -0,0 +1,2 @@
+.build/
+.tools/*/*/
diff --git a/examples/proto/Makefile b/examples/proto/Makefile
new file mode 100644
index 0000000..438a2ef
--- /dev/null
+++ b/examples/proto/Makefile
@@ -0,0 +1,64 @@
+# Code generated by go.einride.tech/sage. DO NOT EDIT.
+# To learn more, see ../../.sage/main.go and https://github.com/einride/sage.
+
+.DEFAULT_GOAL := all
+
+cwd := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+sagefile := $(abspath $(cwd)/../../.sage/bin/sagefile)
+
+# Setup Go.
+go := $(shell command -v go 2>/dev/null)
+export GOWORK ?= off
+ifndef go
+SAGE_GO_VERSION ?= 1.20.2
+export GOROOT := $(abspath $(cwd)/../../.sage/tools/go/$(SAGE_GO_VERSION)/go)
+export PATH := $(PATH):$(GOROOT)/bin
+go := $(GOROOT)/bin/go
+os := $(shell uname | tr '[:upper:]' '[:lower:]')
+arch := $(shell uname -m)
+ifeq ($(arch),x86_64)
+arch := amd64
+endif
+$(go):
+	$(info installing Go $(SAGE_GO_VERSION)...)
+	@mkdir -p $(dir $(GOROOT))
+	@curl -sSL https://go.dev/dl/go$(SAGE_GO_VERSION).$(os)-$(arch).tar.gz | tar xz -C $(dir $(GOROOT))
+	@touch $(GOROOT)/go.mod
+	@chmod +x $(go)
+endif
+
+.PHONY: $(sagefile)
+$(sagefile): $(go)
+	@cd ../../.sage && $(go) mod tidy && $(go) run .
+
+.PHONY: sage
+sage:
+	@$(MAKE) $(sagefile)
+
+.PHONY: update-sage
+update-sage: $(go)
+	@cd ../../.sage && $(go) get -d go.einride.tech/sage@latest && $(go) mod tidy && $(go) run .
+
+.PHONY: clean-sage
+clean-sage:
+	@git clean -fdx ../../.sage/tools ../../.sage/bin ../../.sage/build
+
+.PHONY: all
+all: $(sagefile)
+	@$(sagefile) Proto:All
+
+.PHONY: buf-format
+buf-format: $(sagefile)
+	@$(sagefile) Proto:BufFormat
+
+.PHONY: buf-generate
+buf-generate: $(sagefile)
+	@$(sagefile) Proto:BufGenerate
+
+.PHONY: buf-lint
+buf-lint: $(sagefile)
+	@$(sagefile) Proto:BufLint
+
+.PHONY: build
+build: $(sagefile)
+	@$(sagefile) Proto:Build
diff --git a/examples/proto/buf.gen.yaml b/examples/proto/buf.gen.yaml
new file mode 100644
index 0000000..649b478
--- /dev/null
+++ b/examples/proto/buf.gen.yaml
@@ -0,0 +1,5 @@
+version: v1
+
+plugins:
+  - name: typescript-http
+    out: gen/typescript
diff --git a/examples/proto/buf.lock b/examples/proto/buf.lock
new file mode 100644
index 0000000..e908553
--- /dev/null
+++ b/examples/proto/buf.lock
@@ -0,0 +1,7 @@
+# Generated by buf. DO NOT EDIT.
+version: v1
+deps:
+  - remote: buf.build
+    owner: googleapis
+    repository: googleapis
+    commit: d1263fe26f8e430a967dc22a4d0cad18
diff --git a/examples/proto/buf.yaml b/examples/proto/buf.yaml
new file mode 100644
index 0000000..1e7a817
--- /dev/null
+++ b/examples/proto/buf.yaml
@@ -0,0 +1,15 @@
+version: v1
+
+name: buf.build/einride/protoc-gen-typescript-http
+
+deps:
+  - buf.build/googleapis/googleapis
+
+lint:
+  use:
+    - DEFAULT
+  except:
+    - RPC_REQUEST_STANDARD_NAME
+    - RPC_RESPONSE_STANDARD_NAME
+    - RPC_REQUEST_RESPONSE_UNIQUE
+    - ENUM_VALUE_PREFIX
diff --git a/examples/proto/einride/example/freight/v1/freight_service.proto b/examples/proto/einride/example/freight/v1/freight_service.proto
new file mode 100644
index 0000000..44804d2
--- /dev/null
+++ b/examples/proto/einride/example/freight/v1/freight_service.proto
@@ -0,0 +1,371 @@
+syntax = "proto3";
+
+package einride.example.freight.v1;
+
+import "einride/example/freight/v1/shipment.proto";
+import "einride/example/freight/v1/shipper.proto";
+import "einride/example/freight/v1/site.proto";
+import "google/api/annotations.proto";
+import "google/api/client.proto";
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/protobuf/field_mask.proto";
+
+// This API represents a simple freight service.
+//
+// It defines the following resource model:
+//
+// - The API has a collection of [Shipper][einride.example.freight.v1.Shipper]
+//   resources, named `shippers/*`
+//
+// - Each Shipper has a collection of [Site][einride.example.freight.v1.Site]
+//   resources, named `shippers/*/sites/*`
+//
+// - Each Shipper has a collection of [Shipment][einride.example.freight.v1.Shipment]
+//   resources, named `shippers/*/shipments/*`
+service FreightService {
+  option (google.api.default_host) = "freight-example.einride.tech";
+
+  // Get a shipper.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  rpc GetShipper(GetShipperRequest) returns (Shipper) {
+    option (google.api.http) = {get: "/v1/{name=shippers/*}"};
+    option (google.api.method_signature) = "name";
+  }
+
+  // List shippers.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  rpc ListShippers(ListShippersRequest) returns (ListShippersResponse) {
+    option (google.api.http) = {get: "/v1/shippers"};
+  }
+
+  // Create a shipper.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  rpc CreateShipper(CreateShipperRequest) returns (Shipper) {
+    option (google.api.http) = {
+      post: "/v1/shippers"
+      body: "shipper"
+    };
+    option (google.api.method_signature) = "shipper";
+  }
+
+  // Update a shipper.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  rpc UpdateShipper(UpdateShipperRequest) returns (Shipper) {
+    option (google.api.http) = {
+      patch: "/v1/{shipper.name=shippers/*}"
+      body: "shipper"
+    };
+    option (google.api.method_signature) = "shipper,update_mask";
+  }
+
+  // Delete a shipper.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  rpc DeleteShipper(DeleteShipperRequest) returns (Shipper) {
+    option (google.api.http) = {delete: "/v1/{name=shippers/*}"};
+    option (google.api.method_signature) = "name";
+  }
+
+  // Get a site.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  rpc GetSite(GetSiteRequest) returns (Site) {
+    option (google.api.http) = {get: "/v1/{name=shippers/*/sites/*}"};
+    option (google.api.method_signature) = "name";
+  }
+
+  // List sites for a shipper.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  rpc ListSites(ListSitesRequest) returns (ListSitesResponse) {
+    option (google.api.http) = {get: "/v1/{parent=shippers/*}/sites"};
+    option (google.api.method_signature) = "parent";
+  }
+
+  // Create a site.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  rpc CreateSite(CreateSiteRequest) returns (Site) {
+    option (google.api.http) = {
+      post: "/v1/{parent=shippers/*}/sites"
+      body: "site"
+    };
+    option (google.api.method_signature) = "parent,site";
+  }
+
+  // Update a site.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  rpc UpdateSite(UpdateSiteRequest) returns (Site) {
+    option (google.api.http) = {
+      patch: "/v1/{site.name=shippers/*/sites/*}"
+      body: "site"
+    };
+    option (google.api.method_signature) = "site,update_mask";
+  }
+
+  // Delete a site.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  rpc DeleteSite(DeleteSiteRequest) returns (Site) {
+    option (google.api.http) = {delete: "/v1/{name=shippers/*/sites/*}"};
+    option (google.api.method_signature) = "name";
+  }
+
+  // Get a shipment.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  rpc GetShipment(GetShipmentRequest) returns (Shipment) {
+    option (google.api.http) = {get: "/v1/{name=shippers/*/shipments/*}"};
+    option (google.api.method_signature) = "name";
+  }
+
+  // List shipments for a shipper.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  rpc ListShipments(ListShipmentsRequest) returns (ListShipmentsResponse) {
+    option (google.api.http) = {get: "/v1/{parent=shippers/*}/shipments"};
+    option (google.api.method_signature) = "parent";
+  }
+
+  // Create a shipment.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  rpc CreateShipment(CreateShipmentRequest) returns (Shipment) {
+    option (google.api.http) = {
+      post: "/v1/{parent=shippers/*}/shipments"
+      body: "shipment"
+    };
+    option (google.api.method_signature) = "parent,shipment";
+  }
+
+  // Update a shipment.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  rpc UpdateShipment(UpdateShipmentRequest) returns (Shipment) {
+    option (google.api.http) = {
+      patch: "/v1/{shipment.name=shippers/*/shipments/*}"
+      body: "shipment"
+    };
+    option (google.api.method_signature) = "shipment,update_mask";
+  }
+
+  // Delete a shipment.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  rpc DeleteShipment(DeleteShipmentRequest) returns (Shipment) {
+    option (google.api.http) = {delete: "/v1/{name=shippers/*/shipments/*}"};
+    option (google.api.method_signature) = "name";
+  }
+}
+
+// Request message for FreightService.GetShipper.
+message GetShipperRequest {
+  // The resource name of the shipper to retrieve.
+  // Format: shippers/{shipper}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Shipper"
+  ];
+}
+
+// Request message for FreightService.ListShippers.
+message ListShippersRequest {
+  // Requested page size. Server may return fewer shippers than requested.
+  // If unspecified, server will pick an appropriate default.
+  int32 page_size = 1;
+
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListShippersResponse.next_page_token][einride.example.freight.v1.ListShippersResponse.next_page_token]
+  // returned from the previous call to `ListShippers` method.
+  string page_token = 2;
+}
+
+// Response message for FreightService.ListShippers.
+message ListShippersResponse {
+  // The list of shippers.
+  repeated Shipper shippers = 1;
+
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListShippersRequest.page_token][einride.example.freight.v1.ListShippersRequest.page_token]
+  // field in the subsequent call to `ListShippers` method to retrieve the next
+  // page of results.
+  string next_page_token = 2;
+}
+
+// Request message for FreightService.CreateShipper.
+message CreateShipperRequest {
+  // The shipper to create.
+  Shipper shipper = 1 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Request message for FreightService.UpdateShipper.
+message UpdateShipperRequest {
+  // The shipper to update with. The name must match or be empty.
+  // The shipper's `name` field is used to identify the shipper to be updated.
+  // Format: shippers/{shipper}
+  Shipper shipper = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // The list of fields to be updated.
+  google.protobuf.FieldMask update_mask = 2;
+}
+
+// Request message for FreightService.DeleteShipper.
+message DeleteShipperRequest {
+  // The resource name of the shipper to delete.
+  // Format: shippers/{shipper}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Shipper"
+  ];
+}
+
+// Request message for FreightService.GetSite.
+message GetSiteRequest {
+  // The resource name of the site to retrieve.
+  // Format: shippers/{shipper}/sites/{site}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Site"
+  ];
+}
+
+// Request message for FreightService.ListSites.
+message ListSitesRequest {
+  // The resource name of the parent, which owns this collection of sites.
+  // Format: shippers/{shipper}
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "freight-example.einride.tech/Shipper"
+      child_type: "freight-example.einride.tech/Site"
+    }
+  ];
+
+  // Requested page size. Server may return fewer sites than requested.
+  // If unspecified, server will pick an appropriate default.
+  int32 page_size = 2;
+
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListSitesResponse.next_page_token][einride.example.freight.v1.ListSitesResponse.next_page_token]
+  // returned from the previous call to `ListSites` method.
+  string page_token = 3;
+}
+
+// Response message for FreightService.ListSites.
+message ListSitesResponse {
+  // The list of sites.
+  repeated Site sites = 1;
+
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListSitesRequest.page_token][einride.example.freight.v1.ListSitesRequest.page_token]
+  // field in the subsequent call to `ListSites` method to retrieve the next
+  // page of results.
+  string next_page_token = 2;
+}
+
+// Request message for FreightService.CreateSite.
+message CreateSiteRequest {
+  // The resource name of the parent shipper for which this site will be created.
+  // Format: shippers/{shipper}
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {child_type: "freight-example.einride.tech/Shipper"}
+  ];
+  // The site to create.
+  Site site = 2 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Request message for FreightService.UpdateSite.
+message UpdateSiteRequest {
+  // The site to update with. The name must match or be empty.
+  // The site's `name` field is used to identify the site to be updated.
+  // Format: shippers/{shipper}/sites/{site}
+  Site site = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // The list of fields to be updated.
+  google.protobuf.FieldMask update_mask = 2;
+}
+
+// Request message for FreightService.DeleteSite.
+message DeleteSiteRequest {
+  // The resource name of the site to delete.
+  // Format: shippers/{shipper}/sites/{site}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Site"
+  ];
+}
+
+// Request message for FreightService.GetShipment.
+message GetShipmentRequest {
+  // The resource name of the shipment to retrieve.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Shipment"
+  ];
+}
+
+// Request message for FreightService.ListShipments.
+message ListShipmentsRequest {
+  // The resource name of the parent, which owns this collection of shipments.
+  // Format: shippers/{shipper}
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {
+      type: "freight-example.einride.tech/Shipper"
+      child_type: "freight-example.einride.tech/Shipment"
+    }
+  ];
+
+  // Requested page size. Server may return fewer shipments than requested.
+  // If unspecified, server will pick an appropriate default.
+  int32 page_size = 2;
+
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListShipmentsResponse.next_page_token][einride.example.freight.v1.ListShipmentsResponse.next_page_token]
+  // returned from the previous call to `ListShipments` method.
+  string page_token = 3;
+}
+
+// Response message for FreightService.ListShipments.
+message ListShipmentsResponse {
+  // The list of shipments.
+  repeated Shipment shipments = 1;
+
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListShipmentsRequest.page_token][einride.example.freight.v1.ListShipmentsRequest.page_token]
+  // field in the subsequent call to `ListShipments` method to retrieve the next
+  // page of results.
+  string next_page_token = 2;
+}
+
+// Request message for FreightService.CreateShipment.
+message CreateShipmentRequest {
+  // The resource name of the parent shipper for which this shipment will be created.
+  // Format: shippers/{shipper}
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference) = {child_type: "freight-example.einride.tech/Shipper"}
+  ];
+  // The shipment to create.
+  Shipment shipment = 2 [(google.api.field_behavior) = REQUIRED];
+}
+
+// Request message for FreightService.UpdateShipment.
+message UpdateShipmentRequest {
+  // The shipment to update with. The name must match or be empty.
+  // The shipment's `name` field is used to identify the shipment to be updated.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  Shipment shipment = 1 [(google.api.field_behavior) = REQUIRED];
+
+  // The list of fields to be updated.
+  google.protobuf.FieldMask update_mask = 2;
+}
+
+// Request message for FreightService.DeleteShipment.
+message DeleteShipmentRequest {
+  // The resource name of the shipment to delete.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  string name = 1 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Shipment"
+  ];
+}
diff --git a/examples/proto/einride/example/freight/v1/shipment.proto b/examples/proto/einride/example/freight/v1/shipment.proto
new file mode 100644
index 0000000..f2affa4
--- /dev/null
+++ b/examples/proto/einride/example/freight/v1/shipment.proto
@@ -0,0 +1,77 @@
+syntax = "proto3";
+
+package einride.example.freight.v1;
+
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/protobuf/timestamp.proto";
+
+// A shipment represents transportation of goods between an origin
+// [site][einride.example.freight.v1.Site] and a destination
+// [site][einride.example.freight.v1.Site].
+message Shipment {
+  option (google.api.resource) = {
+    type: "freight-example.einride.tech/Shipment"
+    pattern: "shippers/{shipper}/shipments/{shipment}"
+    singular: "shipment"
+    plural: "shipments"
+  };
+
+  // The resource name of the shipment.
+  string name = 1;
+
+  // The creation timestamp of the shipment.
+  google.protobuf.Timestamp create_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // The last update timestamp of the shipment.
+  //
+  // Updated when create/update/delete operation is shipment.
+  google.protobuf.Timestamp update_time = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // The deletion timestamp of the shipment.
+  google.protobuf.Timestamp delete_time = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // The resource name of the origin site of the shipment.
+  // Format: shippers/{shipper}/sites/{site}
+  string origin_site = 5 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Site"
+  ];
+
+  // The resource name of the destination site of the shipment.
+  // Format: shippers/{shipper}/sites/{site}
+  string destination_site = 6 [
+    (google.api.field_behavior) = REQUIRED,
+    (google.api.resource_reference).type = "freight-example.einride.tech/Site"
+  ];
+
+  // The earliest pickup time of the shipment at the origin site.
+  google.protobuf.Timestamp pickup_earliest_time = 7 [(google.api.field_behavior) = REQUIRED];
+
+  // The latest pickup time of the shipment at the origin site.
+  google.protobuf.Timestamp pickup_latest_time = 8 [(google.api.field_behavior) = REQUIRED];
+
+  // The earliest delivery time of the shipment at the destination site.
+  google.protobuf.Timestamp delivery_earliest_time = 9 [(google.api.field_behavior) = REQUIRED];
+
+  // The latest delivery time of the shipment at the destination site.
+  google.protobuf.Timestamp delivery_latest_time = 10 [(google.api.field_behavior) = REQUIRED];
+
+  // The line items of the shipment.
+  repeated LineItem line_items = 11;
+
+  // Annotations of the shipment.
+  map<string, string> annotations = 12;
+}
+
+// A shipment line item.
+message LineItem {
+  // The title of the line item.
+  string title = 1;
+  // The quantity of the line item.
+  float quantity = 2;
+  // The weight of the line item in kilograms.
+  float weight_kg = 3;
+  // The volume of the line item in cubic meters.
+  float volume_m3 = 4;
+}
diff --git a/examples/proto/einride/example/freight/v1/shipper.proto b/examples/proto/einride/example/freight/v1/shipper.proto
new file mode 100644
index 0000000..a9f3ac2
--- /dev/null
+++ b/examples/proto/einride/example/freight/v1/shipper.proto
@@ -0,0 +1,29 @@
+syntax = "proto3";
+
+package einride.example.freight.v1;
+
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/protobuf/timestamp.proto";
+
+// A shipper is a supplier or owner of goods to be transported.
+message Shipper {
+  option (google.api.resource) = {
+    type: "freight-example.einride.tech/Shipper"
+    pattern: "shippers/{shipper}"
+    singular: "shipper"
+    plural: "shippers"
+  };
+  // The resource name of the shipper.
+  string name = 1;
+  // The creation timestamp of the shipper.
+  google.protobuf.Timestamp create_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The last update timestamp of the shipper.
+  //
+  // Updated when create/update/delete operation is performed.
+  google.protobuf.Timestamp update_time = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The deletion timestamp of the shipper.
+  google.protobuf.Timestamp delete_time = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The display name of the shipper.
+  string display_name = 5 [(google.api.field_behavior) = REQUIRED];
+}
diff --git a/examples/proto/einride/example/freight/v1/site.proto b/examples/proto/einride/example/freight/v1/site.proto
new file mode 100644
index 0000000..370e673
--- /dev/null
+++ b/examples/proto/einride/example/freight/v1/site.proto
@@ -0,0 +1,33 @@
+syntax = "proto3";
+
+package einride.example.freight.v1;
+
+import "google/api/field_behavior.proto";
+import "google/api/resource.proto";
+import "google/protobuf/timestamp.proto";
+import "google/type/latlng.proto";
+
+// A site is a node in a [shipper][einride.example.freight.v1.Shipper]'s
+// transport network.
+message Site {
+  option (google.api.resource) = {
+    type: "freight-example.einride.tech/Site"
+    pattern: "shippers/{shipper}/sites/{site}"
+    singular: "site"
+    plural: "sites"
+  };
+  // The resource name of the site.
+  string name = 1;
+  // The creation timestamp of the site.
+  google.protobuf.Timestamp create_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The last update timestamp of the site.
+  //
+  // Updated when create/update/delete operation is performed.
+  google.protobuf.Timestamp update_time = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The deletion timestamp of the site.
+  google.protobuf.Timestamp delete_time = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
+  // The display name of the site.
+  string display_name = 5 [(google.api.field_behavior) = REQUIRED];
+  // The geographic location of the site.
+  google.type.LatLng lat_lng = 6;
+}
diff --git a/examples/proto/einride/example/syntax/v1/syntax.proto b/examples/proto/einride/example/syntax/v1/syntax.proto
new file mode 100644
index 0000000..37fcbf7
--- /dev/null
+++ b/examples/proto/einride/example/syntax/v1/syntax.proto
@@ -0,0 +1,240 @@
+syntax = "proto3";
+
+package einride.example.syntax.v1;
+
+import "google/protobuf/any.proto";
+import "google/protobuf/duration.proto";
+import "google/protobuf/empty.proto";
+import "google/protobuf/field_mask.proto";
+import "google/protobuf/struct.proto";
+import "google/protobuf/wrappers.proto";
+
+// Message
+message Message {
+  // NestedMessage
+  message NestedMessage {
+    // nested_message.string
+    string string = 1;
+  }
+  // NestedEnum
+  enum NestedEnum {
+    // NESTEDENUM_UNSPECIFIED
+    NESTEDENUM_UNSPECIFIED = 0;
+  }
+  // double
+  double double = 1;
+  // float
+  float float = 2;
+  // int32
+  int32 int32 = 3;
+  // int64
+  int64 int64 = 4;
+  // uint32
+  uint32 uint32 = 5;
+  // uint64
+  uint64 uint64 = 6;
+  // sint32
+  sint32 sint32 = 7;
+  // sint64
+  sint64 sint64 = 8;
+  // fixed32
+  fixed32 fixed32 = 9;
+  // fixed64
+  fixed64 fixed64 = 10;
+  // sfixed32
+  sfixed32 sfixed32 = 11;
+  // sfixed64
+  sfixed64 sfixed64 = 12;
+  // bool
+  bool bool = 13;
+  // string
+  string string = 14;
+  // bytes
+  bytes bytes = 15;
+  // enum
+  Enum enum = 16;
+  // message
+  Message message = 17;
+
+  // optional double
+  optional double optional_double = 81;
+  // optional float
+  optional float optional_float = 82;
+  // optional int32
+  optional int32 optional_int32 = 83;
+  // optional int64
+  optional int64 optional_int64 = 84;
+  // optional uint32
+  optional uint32 optional_uint32 = 85;
+  // optional uint64
+  optional uint64 optional_uint64 = 86;
+  // optional sint32
+  optional sint32 optional_sint32 = 87;
+  // optional sint64
+  optional sint64 optional_sint64 = 88;
+  // optional fixed32
+  optional fixed32 optional_fixed32 = 89;
+  // optional fixed64
+  optional fixed64 optional_fixed64 = 90;
+  // optional sfixed32
+  optional sfixed32 optional_sfixed32 = 91;
+  // optional sfixed64
+  optional sfixed64 optional_sfixed64 = 92;
+  // optional bool
+  optional bool optional_bool = 93;
+  // optional string
+  optional string optional_string = 94;
+  // optional bytes
+  optional bytes optional_bytes = 95;
+  // optional enum
+  optional Enum optional_enum = 96;
+  // optional message
+  optional Message optional_message = 97;
+
+  // repeated_double
+  repeated double repeated_double = 18;
+  // repeated_float
+  repeated float repeated_float = 19;
+  // repeated_int32
+  repeated int32 repeated_int32 = 20;
+  // repeated_int64
+  repeated int64 repeated_int64 = 21;
+  // repeated_uint32
+  repeated uint32 repeated_uint32 = 22;
+  // repeated_uint64
+  repeated uint64 repeated_uint64 = 23;
+  // repeated_sint32
+  repeated sint32 repeated_sint32 = 24;
+  // repeated_sint64
+  repeated sint64 repeated_sint64 = 25;
+  // repeated_fixed32
+  repeated fixed32 repeated_fixed32 = 26;
+  // repeated_fixed64
+  repeated fixed64 repeated_fixed64 = 27;
+  // repeated_sfixed32
+  repeated sfixed32 repeated_sfixed32 = 28;
+  // repeated_sfixed64
+  repeated sfixed64 repeated_sfixed64 = 29;
+  // repeated_bool
+  repeated bool repeated_bool = 30;
+  // repeated_string
+  repeated string repeated_string = 31;
+  // repeated_bytes
+  repeated bytes repeated_bytes = 32;
+  // repeated_enum
+  repeated Enum repeated_enum = 33;
+  // repeated_message
+  repeated Message repeated_message = 34;
+
+  // map_string_string
+  map<string, string> map_string_string = 35;
+  // map_string_message
+  map<string, Message> map_string_message = 36;
+
+  // oneof
+  oneof oneof {
+    // oneof_string
+    string oneof_string = 37;
+    // oneof_enum
+    Enum oneof_enum = 38;
+    // oneof_message1
+    Message oneof_message1 = 39;
+    // oneof_message2
+    Message oneof_message2 = 40;
+  }
+
+  // any
+  google.protobuf.Any any = 41;
+  // repeated_any
+  repeated google.protobuf.Any repeated_any = 42;
+
+  // duration
+  google.protobuf.Duration duration = 43;
+  // repeated_duration
+  repeated google.protobuf.Duration repeated_duration = 44;
+
+  // empty
+  google.protobuf.Empty empty = 45;
+  // repeated_empty
+  repeated google.protobuf.Empty repeated_empty = 46;
+
+  // field_mask
+  google.protobuf.FieldMask field_mask = 47;
+  // repeated_field_mask
+  repeated google.protobuf.FieldMask repeated_field_mask = 48;
+
+  // struct
+  google.protobuf.Struct struct = 49;
+  // repeated_struct
+  repeated google.protobuf.Struct repeated_struct = 50;
+
+  // value
+  google.protobuf.Value value = 51;
+  // repeated_value
+  repeated google.protobuf.Value repeated_value = 52;
+
+  // null_value
+  google.protobuf.NullValue null_value = 53;
+  // repeated_null_value
+  repeated google.protobuf.NullValue repeated_null_value = 54;
+
+  // list_value
+  google.protobuf.ListValue list_value = 55;
+  // repeated_list_value
+  repeated google.protobuf.ListValue repeated_list_value = 56;
+
+  // bool_value
+  google.protobuf.BoolValue bool_value = 57;
+  // repeated_bool_value
+  repeated google.protobuf.BoolValue repeated_bool_value = 58;
+
+  // bytes_value
+  google.protobuf.BytesValue bytes_value = 59;
+  // repeated_bytes_value
+  repeated google.protobuf.BytesValue repeated_bytes_value = 60;
+
+  // double_value
+  google.protobuf.DoubleValue double_value = 61;
+  // repeated_double_value
+  repeated google.protobuf.DoubleValue repeated_double_value = 62;
+
+  // float_value
+  google.protobuf.FloatValue float_value = 63;
+  // repeated_float_value
+  repeated google.protobuf.FloatValue repeated_float_value = 64;
+
+  // int32_value
+  google.protobuf.Int32Value int32_value = 65;
+  // repeated_int32_value
+  repeated google.protobuf.Int32Value repeated_int32_value = 66;
+
+  // int64_value
+  google.protobuf.Int64Value int64_value = 67;
+  // repeated_int64_value
+  repeated google.protobuf.Int64Value repeated_int64_value = 68;
+
+  // uint32_value
+  google.protobuf.UInt32Value uint32_value = 69;
+  // repeated_uint32_value
+  repeated google.protobuf.UInt32Value repeated_uint32_value = 70;
+
+  // uint64_value
+  google.protobuf.UInt64Value uint64_value = 71;
+  // repeated_uint64_value
+  repeated google.protobuf.UInt64Value repeated_uint64_value = 72;
+
+  // string_value
+  google.protobuf.UInt64Value string_value = 73;
+  // repeated_string_value
+  repeated google.protobuf.StringValue repeated_string_value = 74;
+}
+
+// Enum
+enum Enum {
+  // ENUM_UNSPECIFIED
+  ENUM_UNSPECIFIED = 0;
+  // ENUM_ONE
+  ENUM_ONE = 1;
+  // ENUM_TWO
+  ENUM_TWO = 2;
+}
diff --git a/examples/proto/einride/example/syntax/v1/syntax_service.proto b/examples/proto/einride/example/syntax/v1/syntax_service.proto
new file mode 100644
index 0000000..f1c5407
--- /dev/null
+++ b/examples/proto/einride/example/syntax/v1/syntax_service.proto
@@ -0,0 +1,51 @@
+syntax = "proto3";
+
+package einride.example.syntax.v1;
+
+import "einride/example/syntax/v1/syntax.proto";
+import "google/api/annotations.proto";
+import "google/protobuf/empty.proto";
+
+service SyntaxService {
+  rpc QueryOnly(Request) returns (Message) {
+    option (google.api.http) = {get: "/v1"};
+  }
+
+  rpc EmptyVerb(google.protobuf.Empty) returns (google.protobuf.Empty) {
+    option (google.api.http) = {get: "/v1:emptyVerb"};
+  }
+
+  rpc StarBody(Request) returns (Message) {
+    option (google.api.http) = {
+      post: "/v1:starBody"
+      body: "*"
+    };
+  }
+
+  rpc Body(Request) returns (Message) {
+    option (google.api.http) = {
+      post: "/v1:body"
+      body: "nested"
+    };
+  }
+
+  rpc Path(Request) returns (Message) {
+    option (google.api.http) = {post: "/v1/{string}:path"};
+  }
+
+  rpc PathBody(Request) returns (Message) {
+    option (google.api.http) = {
+      post: "/v1/{string}:pathBody"
+      body: "nested"
+    };
+  }
+}
+
+message Request {
+  string string = 1;
+  repeated string repeated_string = 2;
+  message Nested {
+    string string = 1;
+  }
+  Nested nested = 3;
+}
diff --git a/examples/proto/einride/example/syntax/v2/forward.proto b/examples/proto/einride/example/syntax/v2/forward.proto
new file mode 100644
index 0000000..6c8e951
--- /dev/null
+++ b/examples/proto/einride/example/syntax/v2/forward.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package einride.example.syntax.v2;
+
+import "einride/example/syntax/v1/syntax.proto";
+
+// Message
+message Message {
+  einride.example.syntax.v1.Message forwarded_message = 1;
+  einride.example.syntax.v1.Enum forwarded_enum = 2;
+}
diff --git a/examples/proto/gen/typescript/einride/example/freight/v1/index.ts b/examples/proto/gen/typescript/einride/example/freight/v1/index.ts
new file mode 100644
index 0000000..058d98d
--- /dev/null
+++ b/examples/proto/gen/typescript/einride/example/freight/v1/index.ts
@@ -0,0 +1,760 @@
+// Code generated by protoc-gen-typescript-http. DO NOT EDIT.
+/* eslint-disable camelcase */
+// @ts-nocheck
+
+// A shipment represents transportation of goods between an origin
+// [site][einride.example.freight.v1.Site] and a destination
+// [site][einride.example.freight.v1.Site].
+export type Shipment = {
+  // The resource name of the shipment.
+  name: string | undefined;
+  // The creation timestamp of the shipment.
+  //
+  // Behaviors: OUTPUT_ONLY
+  createTime: wellKnownTimestamp | undefined;
+  // The last update timestamp of the shipment.
+  // Updated when create/update/delete operation is shipment.
+  //
+  // Behaviors: OUTPUT_ONLY
+  updateTime: wellKnownTimestamp | undefined;
+  // The deletion timestamp of the shipment.
+  //
+  // Behaviors: OUTPUT_ONLY
+  deleteTime: wellKnownTimestamp | undefined;
+  // The resource name of the origin site of the shipment.
+  // Format: shippers/{shipper}/sites/{site}
+  //
+  // Behaviors: REQUIRED
+  originSite: string | undefined;
+  // The resource name of the destination site of the shipment.
+  // Format: shippers/{shipper}/sites/{site}
+  //
+  // Behaviors: REQUIRED
+  destinationSite: string | undefined;
+  // The earliest pickup time of the shipment at the origin site.
+  //
+  // Behaviors: REQUIRED
+  pickupEarliestTime: wellKnownTimestamp | undefined;
+  // The latest pickup time of the shipment at the origin site.
+  //
+  // Behaviors: REQUIRED
+  pickupLatestTime: wellKnownTimestamp | undefined;
+  // The earliest delivery time of the shipment at the destination site.
+  //
+  // Behaviors: REQUIRED
+  deliveryEarliestTime: wellKnownTimestamp | undefined;
+  // The latest delivery time of the shipment at the destination site.
+  //
+  // Behaviors: REQUIRED
+  deliveryLatestTime: wellKnownTimestamp | undefined;
+  // The line items of the shipment.
+  lineItems: LineItem[] | undefined;
+  // Annotations of the shipment.
+  annotations: { [key: string]: string } | undefined;
+};
+
+// Encoded using RFC 3339, where generated output will always be Z-normalized
+// and uses 0, 3, 6 or 9 fractional digits.
+// Offsets other than "Z" are also accepted.
+type wellKnownTimestamp = string;
+
+// A shipment line item.
+export type LineItem = {
+  // The title of the line item.
+  title: string | undefined;
+  // The quantity of the line item.
+  quantity: number | undefined;
+  // The weight of the line item in kilograms.
+  weightKg: number | undefined;
+  // The volume of the line item in cubic meters.
+  volumeM3: number | undefined;
+};
+
+// A shipper is a supplier or owner of goods to be transported.
+export type Shipper = {
+  // The resource name of the shipper.
+  name: string | undefined;
+  // The creation timestamp of the shipper.
+  //
+  // Behaviors: OUTPUT_ONLY
+  createTime: wellKnownTimestamp | undefined;
+  // The last update timestamp of the shipper.
+  // Updated when create/update/delete operation is performed.
+  //
+  // Behaviors: OUTPUT_ONLY
+  updateTime: wellKnownTimestamp | undefined;
+  // The deletion timestamp of the shipper.
+  //
+  // Behaviors: OUTPUT_ONLY
+  deleteTime: wellKnownTimestamp | undefined;
+  // The display name of the shipper.
+  //
+  // Behaviors: REQUIRED
+  displayName: string | undefined;
+};
+
+// A site is a node in a [shipper][einride.example.freight.v1.Shipper]'s
+// transport network.
+export type Site = {
+  // The resource name of the site.
+  name: string | undefined;
+  // The creation timestamp of the site.
+  //
+  // Behaviors: OUTPUT_ONLY
+  createTime: wellKnownTimestamp | undefined;
+  // The last update timestamp of the site.
+  // Updated when create/update/delete operation is performed.
+  //
+  // Behaviors: OUTPUT_ONLY
+  updateTime: wellKnownTimestamp | undefined;
+  // The deletion timestamp of the site.
+  //
+  // Behaviors: OUTPUT_ONLY
+  deleteTime: wellKnownTimestamp | undefined;
+  // The display name of the site.
+  //
+  // Behaviors: REQUIRED
+  displayName: string | undefined;
+  // The geographic location of the site.
+  latLng: googletype_LatLng | undefined;
+};
+
+// An object that represents a latitude/longitude pair. This is expressed as a
+// pair of doubles to represent degrees latitude and degrees longitude. Unless
+// specified otherwise, this must conform to the
+// <a href="http://www.unoosa.org/pdf/icg/2012/template/WGS_84.pdf">WGS84
+// standard</a>. Values must be within normalized ranges.
+export type googletype_LatLng = {
+  // The latitude in degrees. It must be in the range [-90.0, +90.0].
+  latitude: number | undefined;
+  // The longitude in degrees. It must be in the range [-180.0, +180.0].
+  longitude: number | undefined;
+};
+
+// Request message for FreightService.GetShipper.
+export type GetShipperRequest = {
+  // The resource name of the shipper to retrieve.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// Request message for FreightService.ListShippers.
+export type ListShippersRequest = {
+  // Requested page size. Server may return fewer shippers than requested.
+  // If unspecified, server will pick an appropriate default.
+  pageSize: number | undefined;
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListShippersResponse.next_page_token][einride.example.freight.v1.ListShippersResponse.next_page_token]
+  // returned from the previous call to `ListShippers` method.
+  pageToken: string | undefined;
+};
+
+// Response message for FreightService.ListShippers.
+export type ListShippersResponse = {
+  // The list of shippers.
+  shippers: Shipper[] | undefined;
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListShippersRequest.page_token][einride.example.freight.v1.ListShippersRequest.page_token]
+  // field in the subsequent call to `ListShippers` method to retrieve the next
+  // page of results.
+  nextPageToken: string | undefined;
+};
+
+// Request message for FreightService.CreateShipper.
+export type CreateShipperRequest = {
+  // The shipper to create.
+  //
+  // Behaviors: REQUIRED
+  shipper: Shipper | undefined;
+};
+
+// Request message for FreightService.UpdateShipper.
+export type UpdateShipperRequest = {
+  // The shipper to update with. The name must match or be empty.
+  // The shipper's `name` field is used to identify the shipper to be updated.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  shipper: Shipper | undefined;
+  // The list of fields to be updated.
+  updateMask: wellKnownFieldMask | undefined;
+};
+
+// In JSON, a field mask is encoded as a single string where paths are
+// separated by a comma. Fields name in each path are converted
+// to/from lower-camel naming conventions.
+// As an example, consider the following message declarations:
+//
+//     message Profile {
+//       User user = 1;
+//       Photo photo = 2;
+//     }
+//     message User {
+//       string display_name = 1;
+//       string address = 2;
+//     }
+//
+// In proto a field mask for `Profile` may look as such:
+//
+//     mask {
+//       paths: "user.display_name"
+//       paths: "photo"
+//     }
+//
+// In JSON, the same mask is represented as below:
+//
+//     {
+//       mask: "user.displayName,photo"
+//     }
+type wellKnownFieldMask = string;
+
+// Request message for FreightService.DeleteShipper.
+export type DeleteShipperRequest = {
+  // The resource name of the shipper to delete.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// Request message for FreightService.GetSite.
+export type GetSiteRequest = {
+  // The resource name of the site to retrieve.
+  // Format: shippers/{shipper}/sites/{site}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// Request message for FreightService.ListSites.
+export type ListSitesRequest = {
+  // The resource name of the parent, which owns this collection of sites.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  parent: string | undefined;
+  // Requested page size. Server may return fewer sites than requested.
+  // If unspecified, server will pick an appropriate default.
+  pageSize: number | undefined;
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListSitesResponse.next_page_token][einride.example.freight.v1.ListSitesResponse.next_page_token]
+  // returned from the previous call to `ListSites` method.
+  pageToken: string | undefined;
+};
+
+// Response message for FreightService.ListSites.
+export type ListSitesResponse = {
+  // The list of sites.
+  sites: Site[] | undefined;
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListSitesRequest.page_token][einride.example.freight.v1.ListSitesRequest.page_token]
+  // field in the subsequent call to `ListSites` method to retrieve the next
+  // page of results.
+  nextPageToken: string | undefined;
+};
+
+// Request message for FreightService.CreateSite.
+export type CreateSiteRequest = {
+  // The resource name of the parent shipper for which this site will be created.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  parent: string | undefined;
+  // The site to create.
+  //
+  // Behaviors: REQUIRED
+  site: Site | undefined;
+};
+
+// Request message for FreightService.UpdateSite.
+export type UpdateSiteRequest = {
+  // The site to update with. The name must match or be empty.
+  // The site's `name` field is used to identify the site to be updated.
+  // Format: shippers/{shipper}/sites/{site}
+  //
+  // Behaviors: REQUIRED
+  site: Site | undefined;
+  // The list of fields to be updated.
+  updateMask: wellKnownFieldMask | undefined;
+};
+
+// Request message for FreightService.DeleteSite.
+export type DeleteSiteRequest = {
+  // The resource name of the site to delete.
+  // Format: shippers/{shipper}/sites/{site}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// Request message for FreightService.GetShipment.
+export type GetShipmentRequest = {
+  // The resource name of the shipment to retrieve.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// Request message for FreightService.ListShipments.
+export type ListShipmentsRequest = {
+  // The resource name of the parent, which owns this collection of shipments.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  parent: string | undefined;
+  // Requested page size. Server may return fewer shipments than requested.
+  // If unspecified, server will pick an appropriate default.
+  pageSize: number | undefined;
+  // A token identifying a page of results the server should return.
+  // Typically, this is the value of
+  // [ListShipmentsResponse.next_page_token][einride.example.freight.v1.ListShipmentsResponse.next_page_token]
+  // returned from the previous call to `ListShipments` method.
+  pageToken: string | undefined;
+};
+
+// Response message for FreightService.ListShipments.
+export type ListShipmentsResponse = {
+  // The list of shipments.
+  shipments: Shipment[] | undefined;
+  // A token to retrieve next page of results.  Pass this value in the
+  // [ListShipmentsRequest.page_token][einride.example.freight.v1.ListShipmentsRequest.page_token]
+  // field in the subsequent call to `ListShipments` method to retrieve the next
+  // page of results.
+  nextPageToken: string | undefined;
+};
+
+// Request message for FreightService.CreateShipment.
+export type CreateShipmentRequest = {
+  // The resource name of the parent shipper for which this shipment will be created.
+  // Format: shippers/{shipper}
+  //
+  // Behaviors: REQUIRED
+  parent: string | undefined;
+  // The shipment to create.
+  //
+  // Behaviors: REQUIRED
+  shipment: Shipment | undefined;
+};
+
+// Request message for FreightService.UpdateShipment.
+export type UpdateShipmentRequest = {
+  // The shipment to update with. The name must match or be empty.
+  // The shipment's `name` field is used to identify the shipment to be updated.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  //
+  // Behaviors: REQUIRED
+  shipment: Shipment | undefined;
+  // The list of fields to be updated.
+  updateMask: wellKnownFieldMask | undefined;
+};
+
+// Request message for FreightService.DeleteShipment.
+export type DeleteShipmentRequest = {
+  // The resource name of the shipment to delete.
+  // Format: shippers/{shipper}/shipments/{shipment}
+  //
+  // Behaviors: REQUIRED
+  name: string | undefined;
+};
+
+// This API represents a simple freight service.
+// It defines the following resource model:
+// - The API has a collection of [Shipper][einride.example.freight.v1.Shipper]
+// resources, named `shippers/*`
+// - Each Shipper has a collection of [Site][einride.example.freight.v1.Site]
+// resources, named `shippers/*/sites/*`
+// - Each Shipper has a collection of [Shipment][einride.example.freight.v1.Shipment]
+// resources, named `shippers/*/shipments/*`
+export interface FreightService {
+  // Get a shipper.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  GetShipper(request: GetShipperRequest): Promise<Shipper>;
+  // List shippers.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  ListShippers(request: ListShippersRequest): Promise<ListShippersResponse>;
+  // Create a shipper.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  CreateShipper(request: CreateShipperRequest): Promise<Shipper>;
+  // Update a shipper.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  UpdateShipper(request: UpdateShipperRequest): Promise<Shipper>;
+  // Delete a shipper.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  DeleteShipper(request: DeleteShipperRequest): Promise<Shipper>;
+  // Get a site.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  GetSite(request: GetSiteRequest): Promise<Site>;
+  // List sites for a shipper.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  ListSites(request: ListSitesRequest): Promise<ListSitesResponse>;
+  // Create a site.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  CreateSite(request: CreateSiteRequest): Promise<Site>;
+  // Update a site.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  UpdateSite(request: UpdateSiteRequest): Promise<Site>;
+  // Delete a site.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  DeleteSite(request: DeleteSiteRequest): Promise<Site>;
+  // Get a shipment.
+  // See: https://google.aip.dev/131 (Standard methods: Get).
+  GetShipment(request: GetShipmentRequest): Promise<Shipment>;
+  // List shipments for a shipper.
+  // See: https://google.aip.dev/132 (Standard methods: List).
+  ListShipments(request: ListShipmentsRequest): Promise<ListShipmentsResponse>;
+  // Create a shipment.
+  // See: https://google.aip.dev/133 (Standard methods: Create).
+  CreateShipment(request: CreateShipmentRequest): Promise<Shipment>;
+  // Update a shipment.
+  // See: https://google.aip.dev/134 (Standard methods: Update).
+  UpdateShipment(request: UpdateShipmentRequest): Promise<Shipment>;
+  // Delete a shipment.
+  // See: https://google.aip.dev/135 (Standard methods: Delete).
+  // See: https://google.aip.dev/164 (Soft delete).
+  DeleteShipment(request: DeleteShipmentRequest): Promise<Shipment>;
+}
+
+type RequestType = {
+  path: string;
+  method: string;
+  body: string | null;
+};
+
+type RequestHandler = (request: RequestType, meta: { service: string, method: string }) => Promise<unknown>;
+
+export function createFreightServiceClient(
+  handler: RequestHandler
+): FreightService {
+  return {
+    GetShipper(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "GetShipper",
+      }) as Promise<Shipper>;
+    },
+    ListShippers(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1/shippers`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      if (request.pageSize) {
+        queryParams.push(`pageSize=${encodeURIComponent(request.pageSize.toString())}`)
+      }
+      if (request.pageToken) {
+        queryParams.push(`pageToken=${encodeURIComponent(request.pageToken.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "ListShippers",
+      }) as Promise<ListShippersResponse>;
+    },
+    CreateShipper(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1/shippers`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.shipper ?? {});
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "FreightService",
+        method: "CreateShipper",
+      }) as Promise<Shipper>;
+    },
+    UpdateShipper(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.shipper?.name) {
+        throw new Error("missing required field request.shipper.name");
+      }
+      const path = `v1/${request.shipper.name}`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.shipper ?? {});
+      const queryParams: string[] = [];
+      if (request.updateMask) {
+        queryParams.push(`updateMask=${encodeURIComponent(request.updateMask.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "PATCH",
+        body,
+      }, {
+        service: "FreightService",
+        method: "UpdateShipper",
+      }) as Promise<Shipper>;
+    },
+    DeleteShipper(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "DELETE",
+        body,
+      }, {
+        service: "FreightService",
+        method: "DeleteShipper",
+      }) as Promise<Shipper>;
+    },
+    GetSite(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "GetSite",
+      }) as Promise<Site>;
+    },
+    ListSites(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.parent) {
+        throw new Error("missing required field request.parent");
+      }
+      const path = `v1/${request.parent}/sites`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      if (request.pageSize) {
+        queryParams.push(`pageSize=${encodeURIComponent(request.pageSize.toString())}`)
+      }
+      if (request.pageToken) {
+        queryParams.push(`pageToken=${encodeURIComponent(request.pageToken.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "ListSites",
+      }) as Promise<ListSitesResponse>;
+    },
+    CreateSite(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.parent) {
+        throw new Error("missing required field request.parent");
+      }
+      const path = `v1/${request.parent}/sites`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.site ?? {});
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "FreightService",
+        method: "CreateSite",
+      }) as Promise<Site>;
+    },
+    UpdateSite(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.site?.name) {
+        throw new Error("missing required field request.site.name");
+      }
+      const path = `v1/${request.site.name}`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.site ?? {});
+      const queryParams: string[] = [];
+      if (request.updateMask) {
+        queryParams.push(`updateMask=${encodeURIComponent(request.updateMask.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "PATCH",
+        body,
+      }, {
+        service: "FreightService",
+        method: "UpdateSite",
+      }) as Promise<Site>;
+    },
+    DeleteSite(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "DELETE",
+        body,
+      }, {
+        service: "FreightService",
+        method: "DeleteSite",
+      }) as Promise<Site>;
+    },
+    GetShipment(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "GetShipment",
+      }) as Promise<Shipment>;
+    },
+    ListShipments(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.parent) {
+        throw new Error("missing required field request.parent");
+      }
+      const path = `v1/${request.parent}/shipments`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      if (request.pageSize) {
+        queryParams.push(`pageSize=${encodeURIComponent(request.pageSize.toString())}`)
+      }
+      if (request.pageToken) {
+        queryParams.push(`pageToken=${encodeURIComponent(request.pageToken.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "FreightService",
+        method: "ListShipments",
+      }) as Promise<ListShipmentsResponse>;
+    },
+    CreateShipment(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.parent) {
+        throw new Error("missing required field request.parent");
+      }
+      const path = `v1/${request.parent}/shipments`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.shipment ?? {});
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "FreightService",
+        method: "CreateShipment",
+      }) as Promise<Shipment>;
+    },
+    UpdateShipment(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.shipment?.name) {
+        throw new Error("missing required field request.shipment.name");
+      }
+      const path = `v1/${request.shipment.name}`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.shipment ?? {});
+      const queryParams: string[] = [];
+      if (request.updateMask) {
+        queryParams.push(`updateMask=${encodeURIComponent(request.updateMask.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "PATCH",
+        body,
+      }, {
+        service: "FreightService",
+        method: "UpdateShipment",
+      }) as Promise<Shipment>;
+    },
+    DeleteShipment(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.name) {
+        throw new Error("missing required field request.name");
+      }
+      const path = `v1/${request.name}`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "DELETE",
+        body,
+      }, {
+        service: "FreightService",
+        method: "DeleteShipment",
+      }) as Promise<Shipment>;
+    },
+  };
+}
+
+// @@protoc_insertion_point(typescript-http-eof)
diff --git a/examples/proto/gen/typescript/einride/example/syntax/v1/index.ts b/examples/proto/gen/typescript/einride/example/syntax/v1/index.ts
new file mode 100644
index 0000000..bddca86
--- /dev/null
+++ b/examples/proto/gen/typescript/einride/example/syntax/v1/index.ts
@@ -0,0 +1,457 @@
+// Code generated by protoc-gen-typescript-http. DO NOT EDIT.
+/* eslint-disable camelcase */
+// @ts-nocheck
+
+// Enum
+export type Enum =
+  // ENUM_UNSPECIFIED
+  | "ENUM_UNSPECIFIED"
+  // ENUM_ONE
+  | "ENUM_ONE"
+  // ENUM_TWO
+  | "ENUM_TWO";
+// Message
+export type Message = {
+  // double
+  double: number | undefined;
+  // float
+  float: number | undefined;
+  // int32
+  int32: number | undefined;
+  // int64
+  int64: number | undefined;
+  // uint32
+  uint32: number | undefined;
+  // uint64
+  uint64: number | undefined;
+  // sint32
+  sint32: number | undefined;
+  // sint64
+  sint64: number | undefined;
+  // fixed32
+  fixed32: number | undefined;
+  // fixed64
+  fixed64: number | undefined;
+  // sfixed32
+  sfixed32: number | undefined;
+  // sfixed64
+  sfixed64: number | undefined;
+  // bool
+  bool: boolean | undefined;
+  // string
+  string: string | undefined;
+  // bytes
+  bytes: string | undefined;
+  // enum
+  enum: Enum | undefined;
+  // message
+  message: Message | undefined;
+  // optional double
+  optionalDouble?: number;
+  // optional float
+  optionalFloat?: number;
+  // optional int32
+  optionalInt32?: number;
+  // optional int64
+  optionalInt64?: number;
+  // optional uint32
+  optionalUint32?: number;
+  // optional uint64
+  optionalUint64?: number;
+  // optional sint32
+  optionalSint32?: number;
+  // optional sint64
+  optionalSint64?: number;
+  // optional fixed32
+  optionalFixed32?: number;
+  // optional fixed64
+  optionalFixed64?: number;
+  // optional sfixed32
+  optionalSfixed32?: number;
+  // optional sfixed64
+  optionalSfixed64?: number;
+  // optional bool
+  optionalBool?: boolean;
+  // optional string
+  optionalString?: string;
+  // optional bytes
+  optionalBytes?: string;
+  // optional enum
+  optionalEnum?: Enum;
+  // optional message
+  optionalMessage?: Message;
+  // repeated_double
+  repeatedDouble: number[] | undefined;
+  // repeated_float
+  repeatedFloat: number[] | undefined;
+  // repeated_int32
+  repeatedInt32: number[] | undefined;
+  // repeated_int64
+  repeatedInt64: number[] | undefined;
+  // repeated_uint32
+  repeatedUint32: number[] | undefined;
+  // repeated_uint64
+  repeatedUint64: number[] | undefined;
+  // repeated_sint32
+  repeatedSint32: number[] | undefined;
+  // repeated_sint64
+  repeatedSint64: number[] | undefined;
+  // repeated_fixed32
+  repeatedFixed32: number[] | undefined;
+  // repeated_fixed64
+  repeatedFixed64: number[] | undefined;
+  // repeated_sfixed32
+  repeatedSfixed32: number[] | undefined;
+  // repeated_sfixed64
+  repeatedSfixed64: number[] | undefined;
+  // repeated_bool
+  repeatedBool: boolean[] | undefined;
+  // repeated_string
+  repeatedString: string[] | undefined;
+  // repeated_bytes
+  repeatedBytes: string[] | undefined;
+  // repeated_enum
+  repeatedEnum: Enum[] | undefined;
+  // repeated_message
+  repeatedMessage: Message[] | undefined;
+  // map_string_string
+  mapStringString: { [key: string]: string } | undefined;
+  // map_string_message
+  mapStringMessage: { [key: string]: Message } | undefined;
+  // oneof_string
+  oneofString?: string;
+  // oneof_enum
+  oneofEnum?: Enum;
+  // oneof_message1
+  oneofMessage1?: Message;
+  // oneof_message2
+  oneofMessage2?: Message;
+  // any
+  any: wellKnownAny | undefined;
+  // repeated_any
+  repeatedAny: wellKnownAny[] | undefined;
+  // duration
+  duration: wellKnownDuration | undefined;
+  // repeated_duration
+  repeatedDuration: wellKnownDuration[] | undefined;
+  // empty
+  empty: wellKnownEmpty | undefined;
+  // repeated_empty
+  repeatedEmpty: wellKnownEmpty[] | undefined;
+  // field_mask
+  fieldMask: wellKnownFieldMask | undefined;
+  // repeated_field_mask
+  repeatedFieldMask: wellKnownFieldMask[] | undefined;
+  // struct
+  struct: wellKnownStruct | undefined;
+  // repeated_struct
+  repeatedStruct: wellKnownStruct[] | undefined;
+  // value
+  value: wellKnownValue | undefined;
+  // repeated_value
+  repeatedValue: wellKnownValue[] | undefined;
+  // null_value
+  nullValue: wellKnownNullValue | undefined;
+  // repeated_null_value
+  repeatedNullValue: wellKnownNullValue[] | undefined;
+  // list_value
+  listValue: wellKnownListValue | undefined;
+  // repeated_list_value
+  repeatedListValue: wellKnownListValue[] | undefined;
+  // bool_value
+  boolValue: wellKnownBoolValue | undefined;
+  // repeated_bool_value
+  repeatedBoolValue: wellKnownBoolValue[] | undefined;
+  // bytes_value
+  bytesValue: wellKnownBytesValue | undefined;
+  // repeated_bytes_value
+  repeatedBytesValue: wellKnownBytesValue[] | undefined;
+  // double_value
+  doubleValue: wellKnownDoubleValue | undefined;
+  // repeated_double_value
+  repeatedDoubleValue: wellKnownDoubleValue[] | undefined;
+  // float_value
+  floatValue: wellKnownFloatValue | undefined;
+  // repeated_float_value
+  repeatedFloatValue: wellKnownFloatValue[] | undefined;
+  // int32_value
+  int32Value: wellKnownInt32Value | undefined;
+  // repeated_int32_value
+  repeatedInt32Value: wellKnownInt32Value[] | undefined;
+  // int64_value
+  int64Value: wellKnownInt64Value | undefined;
+  // repeated_int64_value
+  repeatedInt64Value: wellKnownInt64Value[] | undefined;
+  // uint32_value
+  uint32Value: wellKnownUInt32Value | undefined;
+  // repeated_uint32_value
+  repeatedUint32Value: wellKnownUInt32Value[] | undefined;
+  // uint64_value
+  uint64Value: wellKnownUInt64Value | undefined;
+  // repeated_uint64_value
+  repeatedUint64Value: wellKnownUInt64Value[] | undefined;
+  // string_value
+  stringValue: wellKnownUInt64Value | undefined;
+  // repeated_string_value
+  repeatedStringValue: wellKnownStringValue[] | undefined;
+};
+
+// If the Any contains a value that has a special JSON mapping,
+// it will be converted as follows:
+// {"@type": xxx, "value": yyy}.
+// Otherwise, the value will be converted into a JSON object,
+// and the "@type" field will be inserted to indicate the actual data type.
+interface wellKnownAny {
+  "@type": string;
+  [key: string]: unknown;
+}
+
+// Generated output always contains 0, 3, 6, or 9 fractional digits,
+// depending on required precision, followed by the suffix "s".
+// Accepted are any fractional digits (also none) as long as they fit
+// into nano-seconds precision and the suffix "s" is required.
+type wellKnownDuration = string;
+
+// An empty JSON object
+type wellKnownEmpty = Record<never, never>;
+
+// In JSON, a field mask is encoded as a single string where paths are
+// separated by a comma. Fields name in each path are converted
+// to/from lower-camel naming conventions.
+// As an example, consider the following message declarations:
+//
+//     message Profile {
+//       User user = 1;
+//       Photo photo = 2;
+//     }
+//     message User {
+//       string display_name = 1;
+//       string address = 2;
+//     }
+//
+// In proto a field mask for `Profile` may look as such:
+//
+//     mask {
+//       paths: "user.display_name"
+//       paths: "photo"
+//     }
+//
+// In JSON, the same mask is represented as below:
+//
+//     {
+//       mask: "user.displayName,photo"
+//     }
+type wellKnownFieldMask = string;
+
+// Any JSON value.
+type wellKnownStruct = Record<string, unknown>;
+
+type wellKnownValue = unknown;
+
+type wellKnownNullValue = null;
+
+type wellKnownListValue = wellKnownValue[];
+
+type wellKnownBoolValue = boolean | null;
+
+type wellKnownBytesValue = string | null;
+
+type wellKnownDoubleValue = number | null;
+
+type wellKnownFloatValue = number | null;
+
+type wellKnownInt32Value = number | null;
+
+type wellKnownInt64Value = number | null;
+
+type wellKnownUInt32Value = number | null;
+
+type wellKnownUInt64Value = number | null;
+
+type wellKnownStringValue = string | null;
+
+// NestedMessage
+export type Message_NestedMessage = {
+  // nested_message.string
+  string: string | undefined;
+};
+
+// NestedEnum
+export type Message_NestedEnum =
+  // NESTEDENUM_UNSPECIFIED
+  "NESTEDENUM_UNSPECIFIED";
+export type Request = {
+  string: string | undefined;
+  repeatedString: string[] | undefined;
+  nested: Request_Nested | undefined;
+};
+
+export type Request_Nested = {
+  string: string | undefined;
+};
+
+export interface SyntaxService {
+  QueryOnly(request: Request): Promise<Message>;
+  EmptyVerb(request: wellKnownEmpty): Promise<wellKnownEmpty>;
+  StarBody(request: Request): Promise<Message>;
+  Body(request: Request): Promise<Message>;
+  Path(request: Request): Promise<Message>;
+  PathBody(request: Request): Promise<Message>;
+}
+
+type RequestType = {
+  path: string;
+  method: string;
+  body: string | null;
+};
+
+type RequestHandler = (request: RequestType, meta: { service: string, method: string }) => Promise<unknown>;
+
+export function createSyntaxServiceClient(
+  handler: RequestHandler
+): SyntaxService {
+  return {
+    QueryOnly(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      if (request.string) {
+        queryParams.push(`string=${encodeURIComponent(request.string.toString())}`)
+      }
+      if (request.repeatedString) {
+        request.repeatedString.forEach((x) => {
+          queryParams.push(`repeatedString=${encodeURIComponent(x.toString())}`)
+        })
+      }
+      if (request.nested?.string) {
+        queryParams.push(`nested.string=${encodeURIComponent(request.nested.string.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "QueryOnly",
+      }) as Promise<Message>;
+    },
+    EmptyVerb(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1:emptyVerb`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "GET",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "EmptyVerb",
+      }) as Promise<wellKnownEmpty>;
+    },
+    StarBody(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1:starBody`; // eslint-disable-line quotes
+      const body = JSON.stringify(request);
+      const queryParams: string[] = [];
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "StarBody",
+      }) as Promise<Message>;
+    },
+    Body(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      const path = `v1:body`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.nested ?? {});
+      const queryParams: string[] = [];
+      if (request.string) {
+        queryParams.push(`string=${encodeURIComponent(request.string.toString())}`)
+      }
+      if (request.repeatedString) {
+        request.repeatedString.forEach((x) => {
+          queryParams.push(`repeatedString=${encodeURIComponent(x.toString())}`)
+        })
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "Body",
+      }) as Promise<Message>;
+    },
+    Path(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.string) {
+        throw new Error("missing required field request.string");
+      }
+      const path = `v1/${request.string}:path`; // eslint-disable-line quotes
+      const body = null;
+      const queryParams: string[] = [];
+      if (request.repeatedString) {
+        request.repeatedString.forEach((x) => {
+          queryParams.push(`repeatedString=${encodeURIComponent(x.toString())}`)
+        })
+      }
+      if (request.nested?.string) {
+        queryParams.push(`nested.string=${encodeURIComponent(request.nested.string.toString())}`)
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "Path",
+      }) as Promise<Message>;
+    },
+    PathBody(request) { // eslint-disable-line @typescript-eslint/no-unused-vars
+      if (!request.string) {
+        throw new Error("missing required field request.string");
+      }
+      const path = `v1/${request.string}:pathBody`; // eslint-disable-line quotes
+      const body = JSON.stringify(request?.nested ?? {});
+      const queryParams: string[] = [];
+      if (request.repeatedString) {
+        request.repeatedString.forEach((x) => {
+          queryParams.push(`repeatedString=${encodeURIComponent(x.toString())}`)
+        })
+      }
+      let uri = path;
+      if (queryParams.length > 0) {
+        uri += `?${queryParams.join("&")}`
+      }
+      return handler({
+        path: uri,
+        method: "POST",
+        body,
+      }, {
+        service: "SyntaxService",
+        method: "PathBody",
+      }) as Promise<Message>;
+    },
+  };
+}
+
+// @@protoc_insertion_point(typescript-http-eof)
diff --git a/examples/proto/gen/typescript/einride/example/syntax/v2/index.ts b/examples/proto/gen/typescript/einride/example/syntax/v2/index.ts
new file mode 100644
index 0000000..8498ae6
--- /dev/null
+++ b/examples/proto/gen/typescript/einride/example/syntax/v2/index.ts
@@ -0,0 +1,290 @@
+// Code generated by protoc-gen-typescript-http. DO NOT EDIT.
+/* eslint-disable camelcase */
+// @ts-nocheck
+
+// Message
+export type Message = {
+  forwardedMessage: einrideexamplesyntaxv1_Message | undefined;
+  forwardedEnum: einrideexamplesyntaxv1_Enum | undefined;
+};
+
+// Message
+export type einrideexamplesyntaxv1_Message = {
+  // double
+  double: number | undefined;
+  // float
+  float: number | undefined;
+  // int32
+  int32: number | undefined;
+  // int64
+  int64: number | undefined;
+  // uint32
+  uint32: number | undefined;
+  // uint64
+  uint64: number | undefined;
+  // sint32
+  sint32: number | undefined;
+  // sint64
+  sint64: number | undefined;
+  // fixed32
+  fixed32: number | undefined;
+  // fixed64
+  fixed64: number | undefined;
+  // sfixed32
+  sfixed32: number | undefined;
+  // sfixed64
+  sfixed64: number | undefined;
+  // bool
+  bool: boolean | undefined;
+  // string
+  string: string | undefined;
+  // bytes
+  bytes: string | undefined;
+  // enum
+  enum: einrideexamplesyntaxv1_Enum | undefined;
+  // message
+  message: einrideexamplesyntaxv1_Message | undefined;
+  // optional double
+  optionalDouble?: number;
+  // optional float
+  optionalFloat?: number;
+  // optional int32
+  optionalInt32?: number;
+  // optional int64
+  optionalInt64?: number;
+  // optional uint32
+  optionalUint32?: number;
+  // optional uint64
+  optionalUint64?: number;
+  // optional sint32
+  optionalSint32?: number;
+  // optional sint64
+  optionalSint64?: number;
+  // optional fixed32
+  optionalFixed32?: number;
+  // optional fixed64
+  optionalFixed64?: number;
+  // optional sfixed32
+  optionalSfixed32?: number;
+  // optional sfixed64
+  optionalSfixed64?: number;
+  // optional bool
+  optionalBool?: boolean;
+  // optional string
+  optionalString?: string;
+  // optional bytes
+  optionalBytes?: string;
+  // optional enum
+  optionalEnum?: einrideexamplesyntaxv1_Enum;
+  // optional message
+  optionalMessage?: einrideexamplesyntaxv1_Message;
+  // repeated_double
+  repeatedDouble: number[] | undefined;
+  // repeated_float
+  repeatedFloat: number[] | undefined;
+  // repeated_int32
+  repeatedInt32: number[] | undefined;
+  // repeated_int64
+  repeatedInt64: number[] | undefined;
+  // repeated_uint32
+  repeatedUint32: number[] | undefined;
+  // repeated_uint64
+  repeatedUint64: number[] | undefined;
+  // repeated_sint32
+  repeatedSint32: number[] | undefined;
+  // repeated_sint64
+  repeatedSint64: number[] | undefined;
+  // repeated_fixed32
+  repeatedFixed32: number[] | undefined;
+  // repeated_fixed64
+  repeatedFixed64: number[] | undefined;
+  // repeated_sfixed32
+  repeatedSfixed32: number[] | undefined;
+  // repeated_sfixed64
+  repeatedSfixed64: number[] | undefined;
+  // repeated_bool
+  repeatedBool: boolean[] | undefined;
+  // repeated_string
+  repeatedString: string[] | undefined;
+  // repeated_bytes
+  repeatedBytes: string[] | undefined;
+  // repeated_enum
+  repeatedEnum: einrideexamplesyntaxv1_Enum[] | undefined;
+  // repeated_message
+  repeatedMessage: einrideexamplesyntaxv1_Message[] | undefined;
+  // map_string_string
+  mapStringString: { [key: string]: string } | undefined;
+  // map_string_message
+  mapStringMessage: { [key: string]: einrideexamplesyntaxv1_Message } | undefined;
+  // oneof_string
+  oneofString?: string;
+  // oneof_enum
+  oneofEnum?: einrideexamplesyntaxv1_Enum;
+  // oneof_message1
+  oneofMessage1?: einrideexamplesyntaxv1_Message;
+  // oneof_message2
+  oneofMessage2?: einrideexamplesyntaxv1_Message;
+  // any
+  any: wellKnownAny | undefined;
+  // repeated_any
+  repeatedAny: wellKnownAny[] | undefined;
+  // duration
+  duration: wellKnownDuration | undefined;
+  // repeated_duration
+  repeatedDuration: wellKnownDuration[] | undefined;
+  // empty
+  empty: wellKnownEmpty | undefined;
+  // repeated_empty
+  repeatedEmpty: wellKnownEmpty[] | undefined;
+  // field_mask
+  fieldMask: wellKnownFieldMask | undefined;
+  // repeated_field_mask
+  repeatedFieldMask: wellKnownFieldMask[] | undefined;
+  // struct
+  struct: wellKnownStruct | undefined;
+  // repeated_struct
+  repeatedStruct: wellKnownStruct[] | undefined;
+  // value
+  value: wellKnownValue | undefined;
+  // repeated_value
+  repeatedValue: wellKnownValue[] | undefined;
+  // null_value
+  nullValue: wellKnownNullValue | undefined;
+  // repeated_null_value
+  repeatedNullValue: wellKnownNullValue[] | undefined;
+  // list_value
+  listValue: wellKnownListValue | undefined;
+  // repeated_list_value
+  repeatedListValue: wellKnownListValue[] | undefined;
+  // bool_value
+  boolValue: wellKnownBoolValue | undefined;
+  // repeated_bool_value
+  repeatedBoolValue: wellKnownBoolValue[] | undefined;
+  // bytes_value
+  bytesValue: wellKnownBytesValue | undefined;
+  // repeated_bytes_value
+  repeatedBytesValue: wellKnownBytesValue[] | undefined;
+  // double_value
+  doubleValue: wellKnownDoubleValue | undefined;
+  // repeated_double_value
+  repeatedDoubleValue: wellKnownDoubleValue[] | undefined;
+  // float_value
+  floatValue: wellKnownFloatValue | undefined;
+  // repeated_float_value
+  repeatedFloatValue: wellKnownFloatValue[] | undefined;
+  // int32_value
+  int32Value: wellKnownInt32Value | undefined;
+  // repeated_int32_value
+  repeatedInt32Value: wellKnownInt32Value[] | undefined;
+  // int64_value
+  int64Value: wellKnownInt64Value | undefined;
+  // repeated_int64_value
+  repeatedInt64Value: wellKnownInt64Value[] | undefined;
+  // uint32_value
+  uint32Value: wellKnownUInt32Value | undefined;
+  // repeated_uint32_value
+  repeatedUint32Value: wellKnownUInt32Value[] | undefined;
+  // uint64_value
+  uint64Value: wellKnownUInt64Value | undefined;
+  // repeated_uint64_value
+  repeatedUint64Value: wellKnownUInt64Value[] | undefined;
+  // string_value
+  stringValue: wellKnownUInt64Value | undefined;
+  // repeated_string_value
+  repeatedStringValue: wellKnownStringValue[] | undefined;
+};
+
+// Enum
+export type einrideexamplesyntaxv1_Enum =
+  // ENUM_UNSPECIFIED
+  | "ENUM_UNSPECIFIED"
+  // ENUM_ONE
+  | "ENUM_ONE"
+  // ENUM_TWO
+  | "ENUM_TWO";
+// If the Any contains a value that has a special JSON mapping,
+// it will be converted as follows:
+// {"@type": xxx, "value": yyy}.
+// Otherwise, the value will be converted into a JSON object,
+// and the "@type" field will be inserted to indicate the actual data type.
+interface wellKnownAny {
+  "@type": string;
+  [key: string]: unknown;
+}
+
+// Generated output always contains 0, 3, 6, or 9 fractional digits,
+// depending on required precision, followed by the suffix "s".
+// Accepted are any fractional digits (also none) as long as they fit
+// into nano-seconds precision and the suffix "s" is required.
+type wellKnownDuration = string;
+
+// An empty JSON object
+type wellKnownEmpty = Record<never, never>;
+
+// In JSON, a field mask is encoded as a single string where paths are
+// separated by a comma. Fields name in each path are converted
+// to/from lower-camel naming conventions.
+// As an example, consider the following message declarations:
+//
+//     message Profile {
+//       User user = 1;
+//       Photo photo = 2;
+//     }
+//     message User {
+//       string display_name = 1;
+//       string address = 2;
+//     }
+//
+// In proto a field mask for `Profile` may look as such:
+//
+//     mask {
+//       paths: "user.display_name"
+//       paths: "photo"
+//     }
+//
+// In JSON, the same mask is represented as below:
+//
+//     {
+//       mask: "user.displayName,photo"
+//     }
+type wellKnownFieldMask = string;
+
+// Any JSON value.
+type wellKnownStruct = Record<string, unknown>;
+
+type wellKnownValue = unknown;
+
+type wellKnownNullValue = null;
+
+type wellKnownListValue = wellKnownValue[];
+
+type wellKnownBoolValue = boolean | null;
+
+type wellKnownBytesValue = string | null;
+
+type wellKnownDoubleValue = number | null;
+
+type wellKnownFloatValue = number | null;
+
+type wellKnownInt32Value = number | null;
+
+type wellKnownInt64Value = number | null;
+
+type wellKnownUInt32Value = number | null;
+
+type wellKnownUInt64Value = number | null;
+
+type wellKnownStringValue = string | null;
+
+// NestedMessage
+export type einrideexamplesyntaxv1_Message_NestedMessage = {
+  // nested_message.string
+  string: string | undefined;
+};
+
+// NestedEnum
+export type einrideexamplesyntaxv1_Message_NestedEnum =
+  // NESTEDENUM_UNSPECIFIED
+  "NESTEDENUM_UNSPECIFIED";
+
+// @@protoc_insertion_point(typescript-http-eof)
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..18ee815
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,11 @@
+module git.apinb.com/bsm-tools/protoc-gen-ts
+
+go 1.22
+
+require (
+	google.golang.org/genproto/googleapis/api v0.0.0-20240624140628-dc46fd24d27d
+	google.golang.org/protobuf v1.34.2
+	gotest.tools/v3 v3.5.1
+)
+
+require github.com/google/go-cmp v0.5.9 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..15ac3e7
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,8 @@
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+google.golang.org/genproto/googleapis/api v0.0.0-20240624140628-dc46fd24d27d h1:Aqf0fiIdUQEj0Gn9mKFFXoQfTTEaNopWpfVyYADxiSg=
+google.golang.org/genproto/googleapis/api v0.0.0-20240624140628-dc46fd24d27d/go.mod h1:Od4k8V1LQSizPRUK4OzZ7TBE/20k+jPczUDAEyvn69Y=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
+gotest.tools/v3 v3.5.1 h1:EENdUnS3pdur5nybKYIh2Vfgc8IUNBjxDPSjtiJcOzU=
+gotest.tools/v3 v3.5.1/go.mod h1:isy3WKz7GK6uNw/sbHzfKBLvlvXwUyV06n6brMxxopU=
diff --git a/internal/codegen/file.go b/internal/codegen/file.go
new file mode 100644
index 0000000..f28307c
--- /dev/null
+++ b/internal/codegen/file.go
@@ -0,0 +1,21 @@
+package codegen
+
+import (
+	"bytes"
+	"fmt"
+)
+
+type File struct {
+	buf bytes.Buffer
+}
+
+func (f *File) P(v ...interface{}) {
+	for _, x := range v {
+		fmt.Fprint(&f.buf, x)
+	}
+	fmt.Fprintln(&f.buf)
+}
+
+func (f *File) Content() []byte {
+	return f.buf.Bytes()
+}
diff --git a/internal/httprule/fieldpath.go b/internal/httprule/fieldpath.go
new file mode 100644
index 0000000..27c5170
--- /dev/null
+++ b/internal/httprule/fieldpath.go
@@ -0,0 +1,11 @@
+package httprule
+
+import "strings"
+
+// FieldPath describes the path for a field from a message.
+// Individual segments are in snake case (same as in protobuf file).
+type FieldPath []string
+
+func (f FieldPath) String() string {
+	return strings.Join(f, ".")
+}
diff --git a/internal/httprule/rule.go b/internal/httprule/rule.go
new file mode 100644
index 0000000..766e501
--- /dev/null
+++ b/internal/httprule/rule.go
@@ -0,0 +1,94 @@
+package httprule
+
+import (
+	"fmt"
+	"net/http"
+
+	"google.golang.org/genproto/googleapis/api/annotations"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+func Get(m protoreflect.MethodDescriptor) (*annotations.HttpRule, bool) {
+	descriptor, ok := proto.GetExtension(m.Options(), annotations.E_Http).(*annotations.HttpRule)
+	if !ok || descriptor == nil {
+		return nil, false
+	}
+	return descriptor, true
+}
+
+type Rule struct {
+	// The HTTP method to use.
+	Method string
+	// The template describing the URL to use.
+	Template        Template
+	Body            string
+	AdditionalRules []Rule
+}
+
+func ParseRule(httpRule *annotations.HttpRule) (Rule, error) {
+	method, err := httpRuleMethod(httpRule)
+	if err != nil {
+		return Rule{}, err
+	}
+	url, err := httpRuleURL(httpRule)
+	if err != nil {
+		return Rule{}, err
+	}
+	template, err := ParseTemplate(url)
+	if err != nil {
+		return Rule{}, err
+	}
+	additional := make([]Rule, len(httpRule.GetAdditionalBindings()))
+	for i, r := range httpRule.GetAdditionalBindings() {
+		a, err := ParseRule(r)
+		if err != nil {
+			return Rule{}, fmt.Errorf("parse additional binding %d: %w", i, err)
+		}
+		additional[i] = a
+	}
+	return Rule{
+		Method:          method,
+		Template:        template,
+		Body:            httpRule.GetBody(),
+		AdditionalRules: additional,
+	}, nil
+}
+
+func httpRuleURL(rule *annotations.HttpRule) (string, error) {
+	switch v := rule.GetPattern().(type) {
+	case *annotations.HttpRule_Get:
+		return v.Get, nil
+	case *annotations.HttpRule_Post:
+		return v.Post, nil
+	case *annotations.HttpRule_Delete:
+		return v.Delete, nil
+	case *annotations.HttpRule_Patch:
+		return v.Patch, nil
+	case *annotations.HttpRule_Put:
+		return v.Put, nil
+	case *annotations.HttpRule_Custom:
+		return v.Custom.GetPath(), nil
+	default:
+		return "", fmt.Errorf("http rule does not have an URL defined")
+	}
+}
+
+func httpRuleMethod(rule *annotations.HttpRule) (string, error) {
+	switch v := rule.GetPattern().(type) {
+	case *annotations.HttpRule_Get:
+		return http.MethodGet, nil
+	case *annotations.HttpRule_Post:
+		return http.MethodPost, nil
+	case *annotations.HttpRule_Delete:
+		return http.MethodDelete, nil
+	case *annotations.HttpRule_Patch:
+		return http.MethodPatch, nil
+	case *annotations.HttpRule_Put:
+		return http.MethodPut, nil
+	case *annotations.HttpRule_Custom:
+		return v.Custom.GetKind(), nil
+	default:
+		return "", fmt.Errorf("http rule does not have an URL defined")
+	}
+}
diff --git a/internal/httprule/template.go b/internal/httprule/template.go
new file mode 100644
index 0000000..2b0c884
--- /dev/null
+++ b/internal/httprule/template.go
@@ -0,0 +1,397 @@
+package httprule
+
+import "fmt"
+
+// Template represents a http path template.
+//
+// Example: `/v1/{name=books/*}:publish`.
+type Template struct {
+	Segments []Segment
+	Verb     string
+}
+
+// Segment represents a single segment of a Template.
+type Segment struct {
+	Kind     SegmentKind
+	Literal  string
+	Variable VariableSegment
+}
+
+type SegmentKind int
+
+const (
+	SegmentKindLiteral SegmentKind = iota
+	SegmentKindMatchSingle
+	SegmentKindMatchMultiple
+	SegmentKindVariable
+)
+
+// VariableSegment represents a variable segment.
+type VariableSegment struct {
+	FieldPath FieldPath
+	Segments  []Segment
+}
+
+func ParseTemplate(s string) (Template, error) {
+	p := &parser{
+		content: s,
+	}
+	template, err := p.parse()
+	if err != nil {
+		return Template{}, err
+	}
+	if err := validate(template); err != nil {
+		return Template{}, err
+	}
+	return template, nil
+}
+
+type parser struct {
+	content string
+
+	// The next pos in content to read
+	pos int
+	// The currently read rune in content
+	tok rune
+}
+
+func (p *parser) parse() (Template, error) {
+	// Grammar.
+	// Template = "/" Segments [ Verb ] ;
+	// Segments = Segment { "/" Segment } ;
+	// Segment  = "*" | "**" | LITERAL | Variable ;
+	// Variable = "{" FieldPath [ "=" Segments ] "}" ;
+	// FieldPath = IDENT { "." IDENT } ;
+	// Verb     = ":" LITERAL ;.
+	p.next()
+	if err := p.expect('/'); err != nil {
+		return Template{}, err
+	}
+	segments, err := p.parseSegments()
+	if err != nil {
+		return Template{}, err
+	}
+	var verb string
+	if p.tok == ':' {
+		v, err := p.parseVerb()
+		if err != nil {
+			return Template{}, err
+		}
+		verb = v
+	}
+	if p.tok != -1 {
+		return Template{}, fmt.Errorf("expected EOF, got %q", p.tok)
+	}
+	return Template{
+		Segments: segments,
+		Verb:     verb,
+	}, nil
+}
+
+func (p *parser) parseSegments() ([]Segment, error) {
+	seg, err := p.parseSegment()
+	if err != nil {
+		return nil, err
+	}
+	if p.tok == '/' {
+		p.next()
+		rest, err := p.parseSegments()
+		if err != nil {
+			return nil, err
+		}
+		return append([]Segment{seg}, rest...), nil
+	}
+	return []Segment{seg}, nil
+}
+
+func (p *parser) parseSegment() (Segment, error) {
+	switch {
+	case p.tok == '*' && p.peek() == '*':
+		return p.parseMatchMultipleSegment(), nil
+	case p.tok == '*':
+		return p.parseMatchSingleSegment(), nil
+	case p.tok == '{':
+		return p.parseVariableSegment()
+	default:
+		return p.parseLiteralSegment()
+	}
+}
+
+func (p *parser) parseMatchMultipleSegment() Segment {
+	p.next()
+	p.next()
+	return Segment{
+		Kind: SegmentKindMatchMultiple,
+	}
+}
+
+func (p *parser) parseMatchSingleSegment() Segment {
+	p.next()
+	return Segment{
+		Kind: SegmentKindMatchSingle,
+	}
+}
+
+func (p *parser) parseLiteralSegment() (Segment, error) {
+	lit, err := p.parseLiteral()
+	if err != nil {
+		return Segment{}, err
+	}
+	return Segment{
+		Kind:    SegmentKindLiteral,
+		Literal: lit,
+	}, nil
+}
+
+func (p *parser) parseVariableSegment() (Segment, error) {
+	if err := p.expect('{'); err != nil {
+		return Segment{}, err
+	}
+	fieldPath, err := p.parseFieldPath()
+	if err != nil {
+		return Segment{}, err
+	}
+	segments := []Segment{
+		{Kind: SegmentKindMatchSingle},
+	}
+	if p.tok == '=' {
+		p.next()
+		s, err := p.parseSegments()
+		if err != nil {
+			return Segment{}, err
+		}
+		segments = s
+	}
+	if err := p.expect('}'); err != nil {
+		return Segment{}, err
+	}
+	return Segment{
+		Kind: SegmentKindVariable,
+		Variable: VariableSegment{
+			FieldPath: fieldPath,
+			Segments:  segments,
+		},
+	}, nil
+}
+
+func (p *parser) parseVerb() (string, error) {
+	if err := p.expect(':'); err != nil {
+		return "", err
+	}
+	return p.parseLiteral()
+}
+
+func (p *parser) parseFieldPath() ([]string, error) {
+	fp, err := p.parseIdent()
+	if err != nil {
+		return nil, err
+	}
+	if p.tok == '.' {
+		p.next()
+		rest, err := p.parseFieldPath()
+		if err != nil {
+			return nil, err
+		}
+		return append([]string{fp}, rest...), nil
+	}
+	return []string{fp}, nil
+}
+
+// parseLiteral consumes input as long as next token(s) belongs to pchars, as defined in RFC3986.
+// Returns an error if not literal is found.
+//
+// https://www.ietf.org/rfc/rfc3986.txt, P.49
+//
+//	pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
+//	unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
+//	sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
+//	              / "*" / "+" / "," / ";" / "="
+//	pct-encoded   = "%" HEXDIG HEXDIG
+func (p *parser) parseLiteral() (string, error) {
+	var literal []rune
+	startPos := p.pos
+	for {
+		if isSingleCharPChar(p.tok) {
+			literal = append(literal, p.tok)
+			p.next()
+			continue
+		}
+		if p.tok == '%' && isHexDigit(p.peekN(1)) && isHexDigit(p.peekN(2)) {
+			literal = append(literal, p.tok)
+			p.next()
+			literal = append(literal, p.tok)
+			p.next()
+			literal = append(literal, p.tok)
+			p.next()
+			continue
+		}
+		break
+	}
+	if len(literal) == 0 {
+		return "", fmt.Errorf("expected literal at position %d, found %s", startPos-1, p.tokenString())
+	}
+	return string(literal), nil
+}
+
+func (p *parser) parseIdent() (string, error) {
+	var ident []rune
+	startPos := p.pos
+	for {
+		if isAlpha(p.tok) || isDigit(p.tok) || p.tok == '_' {
+			ident = append(ident, p.tok)
+			p.next()
+			continue
+		}
+		break
+	}
+	if len(ident) == 0 {
+		return "", fmt.Errorf("expected identifier at position %d, found %s", startPos-1, p.tokenString())
+	}
+	return string(ident), nil
+}
+
+func (p *parser) next() {
+	if p.pos < len(p.content) {
+		p.tok = rune(p.content[p.pos])
+		p.pos++
+	} else {
+		p.tok = -1
+		p.pos = len(p.content)
+	}
+}
+
+func (p parser) tokenString() string {
+	if p.tok == -1 {
+		return "EOF"
+	}
+	return fmt.Sprintf("%q", p.tok)
+}
+
+func (p *parser) peek() rune {
+	return p.peekN(1)
+}
+
+func (p *parser) peekN(n int) rune {
+	if offset := p.pos + n - 1; offset < len(p.content) {
+		return rune(p.content[offset])
+	}
+	return -1
+}
+
+func (p *parser) expect(r rune) error {
+	if p.tok != r {
+		return fmt.Errorf("expected token %q at position %d, found %s", r, p.pos, p.tokenString())
+	}
+	p.next()
+	return nil
+}
+
+// https://www.ietf.org/rfc/rfc3986.txt, P.49
+//
+//	pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
+//	unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
+//	sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
+//	              / "*" / "+" / "," / ";" / "="
+//	pct-encoded   = "%" HEXDIG HEXDIG
+func isSingleCharPChar(r rune) bool {
+	if isAlpha(r) || isDigit(r) {
+		return true
+	}
+	switch r {
+	case '@', '-', '.', '_', '~', '!',
+		'$', '&', '\'', '(', ')', '*', '+',
+		',', ';', '=': // ':'
+		return true
+	}
+	return false
+}
+
+func isAlpha(r rune) bool {
+	return ('A' <= r && r <= 'Z') || ('a' <= r && r <= 'z')
+}
+
+func isDigit(r rune) bool {
+	return '0' <= r && r <= '9'
+}
+
+func isHexDigit(r rune) bool {
+	switch {
+	case '0' <= r && r <= '9':
+		return true
+	case 'A' <= r && r <= 'F':
+		return true
+	case 'a' <= r && r <= 'f':
+		return true
+	}
+	return false
+}
+
+// validate validates parts of the template that are
+// allowed by the grammar, but disallowed in practice.
+//
+// - nested variable segments
+// - '**' for segments other than the last.
+func validate(t Template) error {
+	// check for nested variable segments
+	for _, s1 := range t.Segments {
+		if s1.Kind != SegmentKindVariable {
+			continue
+		}
+		for _, s2 := range s1.Variable.Segments {
+			if s2.Kind == SegmentKindVariable {
+				return fmt.Errorf("nested variable segment is not allowed")
+			}
+		}
+	}
+	// check for '**' that are not the last part of the template
+	for i, s := range t.Segments {
+		if i == len(t.Segments)-1 {
+			continue
+		}
+		if s.Kind == SegmentKindMatchMultiple {
+			return fmt.Errorf("'**' only allowed as last part of template")
+		}
+		if s.Kind == SegmentKindVariable {
+			for _, s2 := range s.Variable.Segments {
+				if s2.Kind == SegmentKindMatchMultiple {
+					return fmt.Errorf("'**' only allowed as last part of template")
+				}
+			}
+		}
+	}
+	// check for variable where '**' is not last part
+	for _, s := range t.Segments {
+		if s.Kind != SegmentKindVariable {
+			continue
+		}
+		for i, s2 := range s.Variable.Segments {
+			if i == len(s.Variable.Segments)-1 {
+				continue
+			}
+			if s2.Kind == SegmentKindMatchMultiple {
+				return fmt.Errorf("'**' only allowed as the last part of the template")
+			}
+		}
+	}
+	// check for top level expansions
+	for _, s := range t.Segments {
+		if s.Kind == SegmentKindMatchSingle {
+			return fmt.Errorf("'*' must only be used in variables")
+		}
+		if s.Kind == SegmentKindMatchMultiple {
+			return fmt.Errorf("'**' must only be used in variables")
+		}
+	}
+	// check for duplicate variable bindings
+	seen := make(map[string]struct{})
+	for _, s := range t.Segments {
+		if s.Kind == SegmentKindVariable {
+			field := s.Variable.FieldPath.String()
+			if _, ok := seen[s.Variable.FieldPath.String()]; ok {
+				return fmt.Errorf("variable '%s' bound multiple times", field)
+			}
+			seen[field] = struct{}{}
+		}
+	}
+	return nil
+}
diff --git a/internal/httprule/template_test.go b/internal/httprule/template_test.go
new file mode 100644
index 0000000..14929a2
--- /dev/null
+++ b/internal/httprule/template_test.go
@@ -0,0 +1,178 @@
+package httprule
+
+import (
+	"testing"
+
+	"gotest.tools/v3/assert"
+)
+
+func Test_ParseTemplate(t *testing.T) {
+	t.Parallel()
+	for _, tt := range []struct {
+		input string
+		path  Template
+	}{
+		{
+			input: "/v1/messages",
+			path: Template{
+				Segments: []Segment{
+					{Kind: SegmentKindLiteral, Literal: "v1"},
+					{Kind: SegmentKindLiteral, Literal: "messages"},
+				},
+			},
+		},
+		{
+			input: "/v1/messages:peek",
+			path: Template{
+				Segments: []Segment{
+					{Kind: SegmentKindLiteral, Literal: "v1"},
+					{Kind: SegmentKindLiteral, Literal: "messages"},
+				},
+				Verb: "peek",
+			},
+		},
+		{
+			input: "/{id}",
+			path: Template{
+				Segments: []Segment{
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"id"},
+							Segments: []Segment{
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			input: "/{message.id}",
+			path: Template{
+				Segments: []Segment{
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"message", "id"},
+							Segments: []Segment{
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			input: "/{id=messages/*}",
+			path: Template{
+				Segments: []Segment{
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"id"},
+							Segments: []Segment{
+								{Kind: SegmentKindLiteral, Literal: "messages"},
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			input: "/{id=messages/*/threads/*}",
+			path: Template{
+				Segments: []Segment{
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"id"},
+							Segments: []Segment{
+								{Kind: SegmentKindLiteral, Literal: "messages"},
+								{Kind: SegmentKindMatchSingle},
+								{Kind: SegmentKindLiteral, Literal: "threads"},
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			input: "/{id=**}",
+			path: Template{
+				Segments: []Segment{
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"id"},
+							Segments: []Segment{
+								{Kind: SegmentKindMatchMultiple},
+							},
+						},
+					},
+				},
+			},
+		},
+		{
+			input: "/v1/messages/{message}/threads/{thread}",
+			path: Template{
+				Segments: []Segment{
+					{Kind: SegmentKindLiteral, Literal: "v1"},
+					{Kind: SegmentKindLiteral, Literal: "messages"},
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"message"},
+							Segments: []Segment{
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+					{Kind: SegmentKindLiteral, Literal: "threads"},
+					{
+						Kind: SegmentKindVariable,
+						Variable: VariableSegment{
+							FieldPath: []string{"thread"},
+							Segments: []Segment{
+								{Kind: SegmentKindMatchSingle},
+							},
+						},
+					},
+				},
+			},
+		},
+	} {
+		t.Run(tt.input, func(t *testing.T) {
+			t.Parallel()
+			got, err := ParseTemplate(tt.input)
+			assert.NilError(t, err)
+			assert.DeepEqual(t, tt.path, got)
+		})
+	}
+}
+
+func Test_ParseTemplate_Invalid(t *testing.T) {
+	t.Parallel()
+	for _, tt := range []struct {
+		template string
+		expected string
+	}{
+		{template: "", expected: "expected token '/' at position 0, found EOF"},
+		{template: "//", expected: "expected literal at position 1, found '/'"},
+		{template: "/v1:", expected: "expected literal at position 3, found EOF"},
+		{template: "/v1/:", expected: "expected literal at position 4, found ':'"},
+		{template: "/{name=messages/{id}}", expected: "nested variable segment is not allowed"},
+		{template: "/**/*", expected: "'**' only allowed as last part of template"},
+		{template: "/v1/messages/*", expected: "'*' must only be used in variables"},
+		{template: "/v1/{id}/{id}", expected: "variable 'id' bound multiple times"},
+	} {
+		t.Run(tt.template, func(t *testing.T) {
+			t.Parallel()
+			_, err := ParseTemplate(tt.template)
+			assert.Check(t, err != nil)
+			assert.ErrorContains(t, err, tt.expected)
+		})
+	}
+}
diff --git a/internal/plugin/commentgen.go b/internal/plugin/commentgen.go
new file mode 100644
index 0000000..3a1c12a
--- /dev/null
+++ b/internal/plugin/commentgen.go
@@ -0,0 +1,59 @@
+package plugin
+
+import (
+	"strings"
+
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"google.golang.org/genproto/googleapis/api/annotations"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type commentGenerator struct {
+	descriptor protoreflect.Descriptor
+}
+
+func (c commentGenerator) generateLeading(f *codegen.File, indent int) {
+	loc := c.descriptor.ParentFile().SourceLocations().ByDescriptor(c.descriptor)
+	var comments string
+	if loc.TrailingComments != "" {
+		comments = comments + loc.TrailingComments
+	}
+	if loc.LeadingComments != "" {
+		comments = comments + loc.LeadingComments
+	}
+	lines := strings.Split(comments, "\n")
+	for _, line := range lines {
+		if line == "" {
+			continue
+		}
+		f.P(t(indent), "/** "+strings.TrimSpace(line)+" */ ")
+	}
+	if field, ok := c.descriptor.(protoreflect.FieldDescriptor); ok {
+		if behaviorComment := fieldBehaviorComment(field); len(behaviorComment) > 0 {
+			f.P(t(indent), "/** "+behaviorComment+" */")
+		}
+	}
+}
+
+func fieldBehaviorComment(field protoreflect.FieldDescriptor) string {
+	behaviors := getFieldBehaviors(field)
+	if len(behaviors) == 0 {
+		return ""
+	}
+
+	behaviorStrings := make([]string, 0, len(behaviors))
+	for _, b := range behaviors {
+		behaviorStrings = append(behaviorStrings, b.String())
+	}
+	return "Behaviors: " + strings.Join(behaviorStrings, ", ")
+}
+
+func getFieldBehaviors(field protoreflect.FieldDescriptor) []annotations.FieldBehavior {
+	if behaviors, ok := proto.GetExtension(
+		field.Options(), annotations.E_FieldBehavior,
+	).([]annotations.FieldBehavior); ok {
+		return behaviors
+	}
+	return nil
+}
diff --git a/internal/plugin/enumgen.go b/internal/plugin/enumgen.go
new file mode 100644
index 0000000..73f395d
--- /dev/null
+++ b/internal/plugin/enumgen.go
@@ -0,0 +1,31 @@
+package plugin
+
+import (
+	"strconv"
+
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type enumGenerator struct {
+	pkg  protoreflect.FullName
+	enum protoreflect.EnumDescriptor
+}
+
+func (e enumGenerator) Generate(f *codegen.File) {
+	commentGenerator{descriptor: e.enum}.generateLeading(f, 0)
+	f.P("export type ", scopedDescriptorTypeName(e.pkg, e.enum), " =")
+	if e.enum.Values().Len() == 1 {
+		commentGenerator{descriptor: e.enum.Values().Get(0)}.generateLeading(f, 1)
+		f.P(t(1), strconv.Quote(string(e.enum.Values().Get(0).Name())), ";")
+		return
+	}
+	rangeEnumValues(e.enum, func(value protoreflect.EnumValueDescriptor, last bool) {
+		commentGenerator{descriptor: value}.generateLeading(f, 1)
+		if last {
+			f.P(t(1), "| ", strconv.Quote(string(value.Name())), ";")
+		} else {
+			f.P(t(1), "| ", strconv.Quote(string(value.Name())))
+		}
+	})
+}
diff --git a/internal/plugin/generate.go b/internal/plugin/generate.go
new file mode 100644
index 0000000..31fb7fc
--- /dev/null
+++ b/internal/plugin/generate.go
@@ -0,0 +1,52 @@
+package plugin
+
+import (
+	"fmt"
+	"path"
+	"strings"
+
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protodesc"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/types/descriptorpb"
+	"google.golang.org/protobuf/types/pluginpb"
+)
+
+func Generate(request *pluginpb.CodeGeneratorRequest) (*pluginpb.CodeGeneratorResponse, error) {
+	generate := make(map[string]struct{})
+	registry, err := protodesc.NewFiles(&descriptorpb.FileDescriptorSet{
+		File: request.GetProtoFile(),
+	})
+	if err != nil {
+		return nil, fmt.Errorf("create proto registry: %w", err)
+	}
+	for _, f := range request.GetFileToGenerate() {
+		generate[f] = struct{}{}
+	}
+	packaged := make(map[protoreflect.FullName][]protoreflect.FileDescriptor)
+	for _, f := range request.GetFileToGenerate() {
+		file, err := registry.FindFileByPath(f)
+		if err != nil {
+			return nil, fmt.Errorf("find file %s: %w", f, err)
+		}
+		packaged[file.Package()] = append(packaged[file.Package()], file)
+	}
+
+	var res pluginpb.CodeGeneratorResponse
+	for pkg, files := range packaged {
+		var index codegen.File
+		indexPathElems := append(strings.Split(string(pkg), "."), "index.ts")
+		if err := (packageGenerator{pkg: pkg, files: files}).Generate(&index); err != nil {
+			return nil, fmt.Errorf("generate package '%s': %w", pkg, err)
+		}
+		index.P()
+		index.P("// @@protoc_insertion_point(typescript-http-eof)")
+		res.File = append(res.File, &pluginpb.CodeGeneratorResponse_File{
+			Name:    proto.String(path.Join(indexPathElems...)),
+			Content: proto.String(string(index.Content())),
+		})
+	}
+	res.SupportedFeatures = proto.Uint64(uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL))
+	return &res, nil
+}
diff --git a/internal/plugin/helpers.go b/internal/plugin/helpers.go
new file mode 100644
index 0000000..40cb040
--- /dev/null
+++ b/internal/plugin/helpers.go
@@ -0,0 +1,58 @@
+package plugin
+
+import (
+	"strings"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+func scopedDescriptorTypeName(pkg protoreflect.FullName, desc protoreflect.Descriptor) string {
+	name := string(desc.Name())
+	var prefix string
+	if desc.Parent() != desc.ParentFile() {
+		prefix = descriptorTypeName(desc.Parent()) + "_"
+	}
+	if desc.ParentFile().Package() != pkg {
+		prefix = packagePrefix(desc.ParentFile().Package()) + prefix
+	}
+	return prefix + name
+}
+
+func descriptorTypeName(desc protoreflect.Descriptor) string {
+	name := string(desc.Name())
+	var prefix string
+	if desc.Parent() != desc.ParentFile() {
+		prefix = descriptorTypeName(desc.Parent()) + "_"
+	}
+	return prefix + name
+}
+
+func packagePrefix(pkg protoreflect.FullName) string {
+	return strings.Join(strings.Split(string(pkg), "."), "") + "_"
+}
+
+func rangeFields(message protoreflect.MessageDescriptor, f func(field protoreflect.FieldDescriptor)) {
+	for i := 0; i < message.Fields().Len(); i++ {
+		f(message.Fields().Get(i))
+	}
+}
+
+func rangeMethods(methods protoreflect.MethodDescriptors, f func(method protoreflect.MethodDescriptor)) {
+	for i := 0; i < methods.Len(); i++ {
+		f(methods.Get(i))
+	}
+}
+
+func rangeEnumValues(enum protoreflect.EnumDescriptor, f func(value protoreflect.EnumValueDescriptor, last bool)) {
+	for i := 0; i < enum.Values().Len(); i++ {
+		if i == enum.Values().Len()-1 {
+			f(enum.Values().Get(i), true)
+		} else {
+			f(enum.Values().Get(i), false)
+		}
+	}
+}
+
+func t(n int) string {
+	return strings.Repeat("  ", n)
+}
diff --git a/internal/plugin/jsonleafwalk.go b/internal/plugin/jsonleafwalk.go
new file mode 100644
index 0000000..4d356ca
--- /dev/null
+++ b/internal/plugin/jsonleafwalk.go
@@ -0,0 +1,48 @@
+package plugin
+
+import (
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/httprule"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type jsonLeafWalkFunc func(path httprule.FieldPath, field protoreflect.FieldDescriptor)
+
+func walkJSONLeafFields(message protoreflect.MessageDescriptor, f jsonLeafWalkFunc) {
+	var w jsonWalker
+	w.walkMessage(nil, message, f)
+}
+
+type jsonWalker struct {
+	seen map[protoreflect.FullName]struct{}
+}
+
+func (w *jsonWalker) enter(name protoreflect.FullName) bool {
+	if _, ok := w.seen[name]; ok {
+		return false
+	}
+	if w.seen == nil {
+		w.seen = make(map[protoreflect.FullName]struct{})
+	}
+	w.seen[name] = struct{}{}
+	return true
+}
+
+func (w *jsonWalker) walkMessage(path httprule.FieldPath, message protoreflect.MessageDescriptor, f jsonLeafWalkFunc) {
+	if w.enter(message.FullName()) {
+		for i := 0; i < message.Fields().Len(); i++ {
+			field := message.Fields().Get(i)
+			p := append(httprule.FieldPath{}, path...)
+			p = append(p, string(field.Name()))
+			switch {
+			case !field.IsMap() && field.Kind() == protoreflect.MessageKind:
+				if IsWellKnownType(field.Message()) {
+					f(p, field)
+				} else {
+					w.walkMessage(p, field.Message(), f)
+				}
+			default:
+				f(p, field)
+			}
+		}
+	}
+}
diff --git a/internal/plugin/messagegen.go b/internal/plugin/messagegen.go
new file mode 100644
index 0000000..7cd3bc4
--- /dev/null
+++ b/internal/plugin/messagegen.go
@@ -0,0 +1,24 @@
+package plugin
+
+import (
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type messageGenerator struct {
+	pkg     protoreflect.FullName
+	message protoreflect.MessageDescriptor
+}
+
+func (m messageGenerator) Generate(f *codegen.File) {
+	commentGenerator{descriptor: m.message}.generateLeading(f, 0)
+	f.P("export type ", scopedDescriptorTypeName(m.pkg, m.message), " = {")
+	rangeFields(m.message, func(field protoreflect.FieldDescriptor) {
+		commentGenerator{descriptor: field}.generateLeading(f, 1)
+		fieldType := typeFromField(m.pkg, field)
+		f.P(t(1), field.JSONName(), "?: ", fieldType.Reference(), ";")
+	})
+
+	f.P("};")
+	f.P()
+}
diff --git a/internal/plugin/packagegen.go b/internal/plugin/packagegen.go
new file mode 100644
index 0000000..535a108
--- /dev/null
+++ b/internal/plugin/packagegen.go
@@ -0,0 +1,51 @@
+package plugin
+
+import (
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/protowalk"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type packageGenerator struct {
+	pkg   protoreflect.FullName
+	files []protoreflect.FileDescriptor
+}
+
+func (p packageGenerator) Generate(f *codegen.File) error {
+	p.generateHeader(f)
+	var seenService bool
+	var walkErr error
+	protowalk.WalkFiles(p.files, func(desc protoreflect.Descriptor) bool {
+		if wkt, ok := WellKnownType(desc); ok {
+			f.P(wkt.TypeDeclaration())
+			return false
+		}
+		switch v := desc.(type) {
+		case protoreflect.MessageDescriptor:
+			if v.IsMapEntry() {
+				return false
+			}
+			messageGenerator{pkg: p.pkg, message: v}.Generate(f)
+		case protoreflect.EnumDescriptor:
+			enumGenerator{pkg: p.pkg, enum: v}.Generate(f)
+		case protoreflect.ServiceDescriptor:
+			if err := (serviceGenerator{pkg: p.pkg, service: v, genHandler: !seenService}).Generate(f); err != nil {
+				walkErr = err
+				return false
+			}
+			seenService = true
+		}
+		return true
+	})
+	if walkErr != nil {
+		return walkErr
+	}
+	return nil
+}
+
+func (p packageGenerator) generateHeader(f *codegen.File) {
+	f.P("// Code generated by protoc-gen-typescript-http. DO NOT EDIT.")
+	f.P("/* eslint-disable camelcase */")
+	f.P("// @ts-nocheck")
+	f.P()
+}
diff --git a/internal/plugin/servicegen.go b/internal/plugin/servicegen.go
new file mode 100644
index 0000000..13f1c2c
--- /dev/null
+++ b/internal/plugin/servicegen.go
@@ -0,0 +1,237 @@
+package plugin
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/codegen"
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/httprule"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type serviceGenerator struct {
+	pkg        protoreflect.FullName
+	genHandler bool
+	service    protoreflect.ServiceDescriptor
+}
+
+func (s serviceGenerator) Generate(f *codegen.File) error {
+	s.generateInterface(f)
+	if s.genHandler {
+		s.generateHandler(f)
+	}
+	return s.generateClient(f)
+}
+
+func (s serviceGenerator) generateInterface(f *codegen.File) {
+	commentGenerator{descriptor: s.service}.generateLeading(f, 0)
+	f.P("export interface ", descriptorTypeName(s.service), " {")
+	rangeMethods(s.service.Methods(), func(method protoreflect.MethodDescriptor) {
+		if !supportedMethod(method) {
+			return
+		}
+		commentGenerator{descriptor: method}.generateLeading(f, 1)
+		input := typeFromMessage(s.pkg, method.Input())
+		output := typeFromMessage(s.pkg, method.Output())
+		f.P(t(1), method.Name(), "(request: ", input.Reference(), "): Promise<", output.Reference(), ">;")
+	})
+	f.P("}")
+	f.P()
+}
+
+func (s serviceGenerator) generateHandler(f *codegen.File) {
+	f.P("type RequestType = {")
+	f.P(t(1), "path: string;")
+	f.P(t(1), "method: string;")
+	f.P(t(1), "body: string | null;")
+	f.P("};")
+	f.P()
+	f.P("type RequestHandler = (request: RequestType, meta: { service: string, method: string }) => Promise<unknown>;")
+	f.P()
+}
+
+func (s serviceGenerator) generateClient(f *codegen.File) error {
+	f.P(
+		"export function create",
+		descriptorTypeName(s.service),
+		"Client(",
+		"\n",
+		t(1),
+		"handler: RequestHandler",
+		"\n",
+		"): ",
+		descriptorTypeName(s.service),
+		" {",
+	)
+	f.P(t(1), "return {")
+	var methodErr error
+	rangeMethods(s.service.Methods(), func(method protoreflect.MethodDescriptor) {
+		if err := s.generateMethod(f, method); err != nil {
+			methodErr = fmt.Errorf("generate method %s: %w", method.Name(), err)
+		}
+	})
+	if methodErr != nil {
+		return methodErr
+	}
+	f.P(t(1), "};")
+	f.P("}")
+	return nil
+}
+
+func (s serviceGenerator) generateMethod(f *codegen.File, method protoreflect.MethodDescriptor) error {
+	outputType := typeFromMessage(s.pkg, method.Output())
+	r, ok := httprule.Get(method)
+	if !ok {
+		return nil
+	}
+	rule, err := httprule.ParseRule(r)
+	if err != nil {
+		return fmt.Errorf("parse http rule: %w", err)
+	}
+	f.P(t(2), method.Name(), "(request) { // eslint-disable-line @typescript-eslint/no-unused-vars")
+	s.generateMethodPathValidation(f, method.Input(), rule)
+	s.generateMethodPath(f, method.Input(), rule)
+	s.generateMethodBody(f, method.Input(), rule)
+	s.generateMethodQuery(f, method.Input(), rule)
+	f.P(t(3), "let uri = path;")
+	f.P(t(3), "if (queryParams.length > 0) {")
+	f.P(t(4), "uri += `?${queryParams.join(\"&\")}`")
+	f.P(t(3), "}")
+	f.P(t(3), "return handler({")
+	f.P(t(4), "path: uri,")
+	f.P(t(4), "method: ", strconv.Quote(rule.Method), ",")
+	f.P(t(4), "body,")
+	f.P(t(3), "}, {")
+	f.P(t(4), "service: \"", method.Parent().Name(), "\",")
+	f.P(t(4), "method: \"", method.Name(), "\",")
+	f.P(t(3), "}) as Promise<", outputType.Reference(), ">;")
+	f.P(t(2), "},")
+	return nil
+}
+
+func (s serviceGenerator) generateMethodPathValidation(
+	f *codegen.File,
+	input protoreflect.MessageDescriptor,
+	rule httprule.Rule,
+) {
+	for _, seg := range rule.Template.Segments {
+		if seg.Kind != httprule.SegmentKindVariable {
+			continue
+		}
+		fp := seg.Variable.FieldPath
+		nullPath := nullPropagationPath(fp, input)
+		protoPath := strings.Join(fp, ".")
+		errMsg := "missing required field request." + protoPath
+		f.P(t(3), "if (!request.", nullPath, ") {")
+		f.P(t(4), "throw new Error(", strconv.Quote(errMsg), ");")
+		f.P(t(3), "}")
+	}
+}
+
+func (s serviceGenerator) generateMethodPath(
+	f *codegen.File,
+	input protoreflect.MessageDescriptor,
+	rule httprule.Rule,
+) {
+	pathParts := make([]string, 0, len(rule.Template.Segments))
+	for _, seg := range rule.Template.Segments {
+		switch seg.Kind {
+		case httprule.SegmentKindVariable:
+			fieldPath := jsonPath(seg.Variable.FieldPath, input)
+			pathParts = append(pathParts, "${request."+fieldPath+"}")
+		case httprule.SegmentKindLiteral:
+			pathParts = append(pathParts, seg.Literal)
+		case httprule.SegmentKindMatchSingle: // TODO: Double check this and following case
+			pathParts = append(pathParts, "*")
+		case httprule.SegmentKindMatchMultiple:
+			pathParts = append(pathParts, "**")
+		}
+	}
+	path := strings.Join(pathParts, "/")
+	if rule.Template.Verb != "" {
+		path += ":" + rule.Template.Verb
+	}
+	f.P(t(3), "const path = `", path, "`; // eslint-disable-line quotes")
+}
+
+func (s serviceGenerator) generateMethodBody(
+	f *codegen.File,
+	input protoreflect.MessageDescriptor,
+	rule httprule.Rule,
+) {
+	switch {
+	case rule.Body == "":
+		f.P(t(3), "const body = null;")
+	case rule.Body == "*":
+		f.P(t(3), "const body = JSON.stringify(request);")
+	default:
+		nullPath := nullPropagationPath(httprule.FieldPath{rule.Body}, input)
+		f.P(t(3), "const body = JSON.stringify(request?.", nullPath, " ?? {});")
+	}
+}
+
+func (s serviceGenerator) generateMethodQuery(
+	f *codegen.File,
+	input protoreflect.MessageDescriptor,
+	rule httprule.Rule,
+) {
+	f.P(t(3), "const queryParams: string[] = [];")
+	// nothing in query
+	if rule.Body == "*" {
+		return
+	}
+	// fields covered by path
+	pathCovered := make(map[string]struct{})
+	for _, segment := range rule.Template.Segments {
+		if segment.Kind != httprule.SegmentKindVariable {
+			continue
+		}
+		pathCovered[segment.Variable.FieldPath.String()] = struct{}{}
+	}
+	walkJSONLeafFields(input, func(path httprule.FieldPath, field protoreflect.FieldDescriptor) {
+		if _, ok := pathCovered[path.String()]; ok {
+			return
+		}
+		if rule.Body != "" && path[0] == rule.Body {
+			return
+		}
+		nullPath := nullPropagationPath(path, input)
+		jp := jsonPath(path, input)
+		f.P(t(3), "if (request.", nullPath, ") {")
+		switch {
+		case field.IsList():
+			f.P(t(4), "request.", jp, ".forEach((x) => {")
+			f.P(t(5), "queryParams.push(`", jp, "=${encodeURIComponent(x.toString())}`)")
+			f.P(t(4), "})")
+		default:
+			f.P(t(4), "queryParams.push(`", jp, "=${encodeURIComponent(request.", jp, ".toString())}`)")
+		}
+		f.P(t(3), "}")
+	})
+}
+
+func supportedMethod(method protoreflect.MethodDescriptor) bool {
+	_, ok := httprule.Get(method)
+	return ok && !method.IsStreamingClient() && !method.IsStreamingServer()
+}
+
+func jsonPath(path httprule.FieldPath, message protoreflect.MessageDescriptor) string {
+	return strings.Join(jsonPathSegments(path, message), ".")
+}
+
+func nullPropagationPath(path httprule.FieldPath, message protoreflect.MessageDescriptor) string {
+	return strings.Join(jsonPathSegments(path, message), "?.")
+}
+
+func jsonPathSegments(path httprule.FieldPath, message protoreflect.MessageDescriptor) []string {
+	segs := make([]string, len(path))
+	for i, p := range path {
+		field := message.Fields().ByName(protoreflect.Name(p))
+		segs[i] = field.JSONName()
+		if i < len(path) {
+			message = field.Message()
+		}
+	}
+	return segs
+}
diff --git a/internal/plugin/type.go b/internal/plugin/type.go
new file mode 100644
index 0000000..94ef602
--- /dev/null
+++ b/internal/plugin/type.go
@@ -0,0 +1,82 @@
+package plugin
+
+import "google.golang.org/protobuf/reflect/protoreflect"
+
+type Type struct {
+	IsNamed bool
+	Name    string
+
+	IsList     bool
+	IsMap      bool
+	Underlying *Type
+}
+
+func (t Type) Reference() string {
+	switch {
+	case t.IsMap:
+		return "{ [key: string]: " + t.Underlying.Reference() + " }"
+	case t.IsList:
+		return t.Underlying.Reference() + "[]"
+	default:
+		return t.Name
+	}
+}
+
+func typeFromField(pkg protoreflect.FullName, field protoreflect.FieldDescriptor) Type {
+	switch {
+	case field.IsMap():
+		underlying := namedTypeFromField(pkg, field.MapValue())
+		return Type{
+			IsMap:      true,
+			Underlying: &underlying,
+		}
+	case field.IsList():
+		underlying := namedTypeFromField(pkg, field)
+		return Type{
+			IsList:     true,
+			Underlying: &underlying,
+		}
+	default:
+		return namedTypeFromField(pkg, field)
+	}
+}
+
+func namedTypeFromField(pkg protoreflect.FullName, field protoreflect.FieldDescriptor) Type {
+	switch field.Kind() {
+	case protoreflect.StringKind, protoreflect.BytesKind:
+		return Type{IsNamed: true, Name: "string"}
+	case protoreflect.BoolKind:
+		return Type{IsNamed: true, Name: "boolean"}
+	case
+		protoreflect.Int32Kind,
+		protoreflect.Int64Kind,
+		protoreflect.Uint32Kind,
+		protoreflect.Uint64Kind,
+		protoreflect.DoubleKind,
+		protoreflect.Fixed32Kind,
+		protoreflect.Fixed64Kind,
+		protoreflect.Sfixed32Kind,
+		protoreflect.Sfixed64Kind,
+		protoreflect.Sint32Kind,
+		protoreflect.Sint64Kind,
+		protoreflect.FloatKind:
+		return Type{IsNamed: true, Name: "number"}
+	case protoreflect.MessageKind:
+		return typeFromMessage(pkg, field.Message())
+	case protoreflect.EnumKind:
+		desc := field.Enum()
+		if wkt, ok := WellKnownType(field.Enum()); ok {
+			return Type{IsNamed: true, Name: wkt.Name()}
+		}
+		return Type{IsNamed: true, Name: scopedDescriptorTypeName(pkg, desc)}
+	default:
+		return Type{IsNamed: true, Name: "unknown"}
+	}
+}
+
+func typeFromMessage(pkg protoreflect.FullName, message protoreflect.MessageDescriptor) Type {
+	if wkt, ok := WellKnownType(message); ok {
+		return Type{IsNamed: true, Name: wkt.Name()}
+	}
+	return Type{IsNamed: true, Name: scopedDescriptorTypeName(pkg, message)}
+}
diff --git a/internal/plugin/wellknown.go b/internal/plugin/wellknown.go
new file mode 100644
index 0000000..6a8cf00
--- /dev/null
+++ b/internal/plugin/wellknown.go
@@ -0,0 +1,157 @@
+package plugin
+
+import (
+	"strings"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+const (
+	wellKnownPrefix = "google.protobuf."
+)
+
+type WellKnown string
+
+// https://developers.google.com/protocol-buffers/docs/reference/google.protobuf
+const (
+	WellKnownAny       WellKnown = "google.protobuf.Any"
+	WellKnownDuration  WellKnown = "google.protobuf.Duration"
+	WellKnownEmpty     WellKnown = "google.protobuf.Empty"
+	WellKnownFieldMask WellKnown = "google.protobuf.FieldMask"
+	WellKnownStruct    WellKnown = "google.protobuf.Struct"
+	WellKnownTimestamp WellKnown = "google.protobuf.Timestamp"
+
+	// Wrapper types.
+	WellKnownFloatValue  WellKnown = "google.protobuf.FloatValue"
+	WellKnownInt64Value  WellKnown = "google.protobuf.Int64Value"
+	WellKnownInt32Value  WellKnown = "google.protobuf.Int32Value"
+	WellKnownUInt64Value WellKnown = "google.protobuf.UInt64Value"
+	WellKnownUInt32Value WellKnown = "google.protobuf.UInt32Value"
+	WellKnownBytesValue  WellKnown = "google.protobuf.BytesValue"
+	WellKnownDoubleValue WellKnown = "google.protobuf.DoubleValue"
+	WellKnownBoolValue   WellKnown = "google.protobuf.BoolValue"
+	WellKnownStringValue WellKnown = "google.protobuf.StringValue"
+
+	// Descriptor types.
+	WellKnownValue     WellKnown = "google.protobuf.Value"
+	WellKnownNullValue WellKnown = "google.protobuf.NullValue"
+	WellKnownListValue WellKnown = "google.protobuf.ListValue"
+)
+
+func IsWellKnownType(desc protoreflect.Descriptor) bool {
+	switch desc.(type) {
+	case protoreflect.MessageDescriptor, protoreflect.EnumDescriptor:
+		return strings.HasPrefix(string(desc.FullName()), wellKnownPrefix)
+	default:
+		return false
+	}
+}
+
+func WellKnownType(desc protoreflect.Descriptor) (WellKnown, bool) {
+	if !IsWellKnownType(desc) {
+		return "", false
+	}
+	return WellKnown(desc.FullName()), true
+}
+
+func (wkt WellKnown) Name() string {
+	return "wellKnown" + strings.TrimPrefix(string(wkt), wellKnownPrefix)
+}
+
+func (wkt WellKnown) TypeDeclaration() string {
+	var w writer
+	switch wkt {
+	case WellKnownAny:
+		w.P("// If the Any contains a value that has a special JSON mapping,")
+		w.P("// it will be converted as follows:")
+		w.P("// {\"@type\": xxx, \"value\": yyy}.")
+		w.P("// Otherwise, the value will be converted into a JSON object,")
+		w.P("// and the \"@type\" field will be inserted to indicate the actual data type.")
+		w.P("interface ", wkt.Name(), " {")
+		w.P("  ", "\"@type\": string;")
+		w.P("  [key: string]: unknown;")
+		w.P("}")
+	case WellKnownDuration:
+		w.P("// Generated output always contains 0, 3, 6, or 9 fractional digits,")
+		w.P("// depending on required precision, followed by the suffix \"s\".")
+		w.P("// Accepted are any fractional digits (also none) as long as they fit")
+		w.P("// into nano-seconds precision and the suffix \"s\" is required.")
+		w.P("type ", wkt.Name(), " = string;")
+	case WellKnownEmpty:
+		w.P("// An empty JSON object")
+		w.P("type ", wkt.Name(), " = Record<never, never>;")
+	case WellKnownTimestamp:
+		w.P("// Encoded using RFC 3339, where generated output will always be Z-normalized")
+		w.P("// and uses 0, 3, 6 or 9 fractional digits.")
+		w.P("// Offsets other than \"Z\" are also accepted.")
+		w.P("type ", wkt.Name(), " = string;")
+	case WellKnownFieldMask:
+		w.P("// In JSON, a field mask is encoded as a single string where paths are")
+		w.P("// separated by a comma. Fields name in each path are converted")
+		w.P("// to/from lower-camel naming conventions.")
+		w.P("// As an example, consider the following message declarations:")
+		w.P("//")
+		w.P("//     message Profile {")
+		w.P("//       User user = 1;")
+		w.P("//       Photo photo = 2;")
+		w.P("//     }")
+		w.P("//     message User {")
+		w.P("//       string display_name = 1;")
+		w.P("//       string address = 2;")
+		w.P("//     }")
+		w.P("//")
+		w.P("// In proto a field mask for `Profile` may look as such:")
+		w.P("//")
+		w.P("//     mask {")
+		w.P("//       paths: \"user.display_name\"")
+		w.P("//       paths: \"photo\"")
+		w.P("//     }")
+		w.P("//")
+		w.P("// In JSON, the same mask is represented as below:")
+		w.P("//")
+		w.P("//     {")
+		w.P("//       mask: \"user.displayName,photo\"")
+		w.P("//     }")
+		w.P("type ", wkt.Name(), " = string;")
+	case WellKnownFloatValue,
+		WellKnownDoubleValue,
+		WellKnownInt64Value,
+		WellKnownInt32Value,
+		WellKnownUInt64Value,
+		WellKnownUInt32Value:
+		w.P("type ", wkt.Name(), " = number | null;")
+	case WellKnownBytesValue, WellKnownStringValue:
+		w.P("type ", wkt.Name(), " = string | null;")
+	case WellKnownBoolValue:
+		w.P("type ", wkt.Name(), " = boolean | null;")
+	case WellKnownStruct:
+		w.P("// Any JSON value.")
+		w.P("type ", wkt.Name(), " = Record<string, unknown>;")
+	case WellKnownValue:
+		w.P("type ", wkt.Name(), " = unknown;")
+	case WellKnownNullValue:
+		w.P("type ", wkt.Name(), " = null;")
+	case WellKnownListValue:
+		w.P("type ", wkt.Name(), " = ", WellKnownValue.Name(), "[];")
+	default:
+		w.P("// No mapping for this well known type is generated, yet.")
+		w.P("type ", wkt.Name(), " = unknown;")
+	}
+	return w.String()
+}
+
+type writer struct {
+	b strings.Builder
+}
+
+func (w *writer) P(ss ...string) {
+	for _, s := range ss {
+		// strings.Builder never returns an error, so safe to ignore
+		_, _ = w.b.WriteString(s)
+	}
+	_, _ = w.b.WriteString("\n")
+}
+
+func (w *writer) String() string {
+	return w.b.String()
+}
diff --git a/internal/protowalk/walk.go b/internal/protowalk/walk.go
new file mode 100644
index 0000000..75c21df
--- /dev/null
+++ b/internal/protowalk/walk.go
@@ -0,0 +1,128 @@
+package protowalk
+
+import (
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type WalkFunc func(desc protoreflect.Descriptor) bool
+
+func WalkFiles(files []protoreflect.FileDescriptor, f WalkFunc) {
+	var w walker
+	w.walkFiles(files, f)
+}
+
+type walker struct {
+	seen map[string]struct{}
+}
+
+func (w *walker) enter(name string) bool {
+	if _, ok := w.seen[name]; ok {
+		return false
+	}
+	if w.seen == nil {
+		w.seen = make(map[string]struct{})
+	}
+	w.seen[name] = struct{}{}
+	return true
+}
+
+func (w *walker) walkFiles(files []protoreflect.FileDescriptor, f WalkFunc) {
+	for _, file := range files {
+		w.walkFile(file, f)
+	}
+}
+
+func (w *walker) walkFile(file protoreflect.FileDescriptor, f WalkFunc) {
+	if w.enter(file.Path()) {
+		if !f(file) {
+			return
+		}
+		w.walkEnums(file.Enums(), f)
+		w.walkMessages(file.Messages(), f)
+		w.walkServices(file.Services(), f)
+	}
+}
+
+func (w *walker) walkEnums(enums protoreflect.EnumDescriptors, f WalkFunc) {
+	for i := 0; i < enums.Len(); i++ {
+		w.walkEnum(enums.Get(i), f)
+	}
+}
+
+func (w *walker) walkEnum(enum protoreflect.EnumDescriptor, f WalkFunc) {
+	if w.enter(string(enum.FullName())) {
+		f(enum)
+	}
+}
+
+func (w *walker) walkMessages(messages protoreflect.MessageDescriptors, f WalkFunc) {
+	for i := 0; i < messages.Len(); i++ {
+		w.walkMessage(messages.Get(i), f)
+	}
+}
+
+func (w *walker) walkMessage(message protoreflect.MessageDescriptor, f WalkFunc) {
+	if w.enter(string(message.FullName())) {
+		if !f(message) {
+			return
+		}
+		w.walkFields(message.Fields(), f)
+		w.walkMessages(message.Messages(), f)
+		w.walkEnums(message.Enums(), f)
+	}
+}
+
+func (w *walker) walkFields(fields protoreflect.FieldDescriptors, f WalkFunc) {
+	for i := 0; i < fields.Len(); i++ {
+		w.walkField(fields.Get(i), f)
+	}
+}
+
+func (w *walker) walkField(field protoreflect.FieldDescriptor, f WalkFunc) {
+	if w.enter(string(field.FullName())) {
+		if !f(field) {
+			return
+		}
+		if field.IsMap() {
+			w.walkField(field.MapKey(), f)
+			w.walkField(field.MapValue(), f)
+		}
+		if field.Message() != nil {
+			w.walkMessage(field.Message(), f)
+		}
+		if field.Enum() != nil {
+			w.walkEnum(field.Enum(), f)
+		}
+	}
+}
+
+func (w *walker) walkServices(services protoreflect.ServiceDescriptors, f WalkFunc) {
+	for i := 0; i < services.Len(); i++ {
+		w.walkService(services.Get(i), f)
+	}
+}
+
+func (w *walker) walkService(service protoreflect.ServiceDescriptor, f WalkFunc) {
+	if w.enter(string(service.FullName())) {
+		if !f(service) {
+			return
+		}
+		w.walkMethods(service.Methods(), f)
+	}
+}
+
+func (w *walker) walkMethods(methods protoreflect.MethodDescriptors, f WalkFunc) {
+	for i := 0; i < methods.Len(); i++ {
+		w.walkMethod(methods.Get(i), f)
+	}
+}
+
+func (w *walker) walkMethod(method protoreflect.MethodDescriptor, f WalkFunc) {
+	if w.enter(string(method.FullName())) {
+		if !f(method) {
+			return
+		}
+		w.walkMessage(method.Input(), f)
+		w.walkMessage(method.Output(), f)
+	}
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..22ae01d
--- /dev/null
+++ b/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"git.apinb.com/bsm-tools/protoc-gen-ts/internal/plugin"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/pluginpb"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: %v\n", filepath.Base(os.Args[0]), err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	in, err := io.ReadAll(os.Stdin)
+	if err != nil {
+		return err
+	}
+	req := &pluginpb.CodeGeneratorRequest{}
+	if err := proto.Unmarshal(in, req); err != nil {
+		return err
+	}
+	resp, err := plugin.Generate(req)
+	if err != nil {
+		return err
+	}
+	out, err := proto.Marshal(resp)
+	if err != nil {
+		return err
+	}
+	if _, err := os.Stdout.Write(out); err != nil {
+		return err
+	}
+	return nil
+}