# document-api-endpoint

Documents and types Sentry API routes using drf-spectacular. It resolves type drift between declared OpenAPI schemas and live endpoint responses.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1200 installs · ★ 1089
- Author: getsentry
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/getsentry/skills/tree/HEAD/skills/document-api-endpoint/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/document-api-endpoint

## What it does

The skill guides adding `@extend_schema` decorators to Sentry endpoint classes and methods. It reuses parameters from `src/sentry/apidocs/parameters.py`, assigns tags from `OPENAPI_TAGS`, and builds response shapes with `TypedDict`. For payload fields, `T | None` signals a required key with a null value, while `NotRequired[T]` handles optional keys like those triggered by an `expand` query parameter.

Migrating legacy paths is strictly all-or-nothing per path because drf-spectacular's `APPEND_PATHS` does not merge HTTP methods. Adding `@extend_schema` to one method causes all untransferred legacy methods on that route to disappear from the schema. Moving an endpoint to `PUBLIC` requires updating `publish_status`, assigning `owner = ApiOwner.<TEAM>`, and clearing the method from `API_OWNERSHIP_ALLOWLIST_DONT_MODIFY`.

Verification relies on `make build-api-docs`, `pnpm run validate-api-examples`, and targeted pytest runs in the virtual environment. To catch discrepancies like numbers formatted as strings, compare live `curl` output piped into `jq` against your types.

## Requirements
- Works with: Sentry

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill document-api-endpoint -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/document-api-endpoint/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/document-api-endpoint/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill document-api-endpoint -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/document-api-endpoint/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill document-api-endpoint -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/document-api-endpoint/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install getsentry/skills document-api-endpoint
```

2. **Manually: put the files in place**
- File: `.github/skills/document-api-endpoint/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill document-api-endpoint -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/getsentry/skills --path skills/document-api-endpoint
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/document-api-endpoint/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add getsentry/skills --skill document-api-endpoint -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/getsentry/skills/tree/HEAD/skills/document-api-endpoint/SKILL.md

## When to use it
- add `@extend_schema` decorators to a Sentry endpoint
- fix type drift between runtime API responses and schemas
- migrate legacy JSON specifications from `api-docs/paths/`
- promote a private endpoint to `PUBLIC` with team ownership

## Example prompts
- Document this Sentry endpoint and write the response TypedDict
- Fix type drift for this route against the live API response
- Promote this endpoint to PUBLIC and remove it from the ownership allowlist

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: c4faadabc19908b3.

BEGIN THIRD-PARTY FILE c4faadabc19908b3
````text
---
name: document-api-endpoint
description: Document and type a Sentry API endpoint. Write or fix @extend_schema decorators, specify response TypedDicts, type request parameters, correct type drift between the declared schema and the runtime response, and validate the generated spec. Use when asked to "document an endpoint", "add OpenAPI docs", "add/fix @extend_schema", "type an endpoint response", "fix the response type", "fix type drift", "reuse a response type", "split an overloaded endpoint", "specify the response schema", "add a TypedDict response", "migrate a legacy api-docs path", "fix a parameter type", or "make an endpoint public" / "promote an endpoint" (promotion is one section here).
---

# Document & Type a Sentry API Endpoint

Add or fix OpenAPI docs for a Sentry endpoint with drf-spectacular. Full reference is at https://develop.sentry.dev/backend/api/public/, the most useful section to you will be https://develop.sentry.dev/backend/api/public/#5-method-decorator. This skill captures the non-obvious lessons on top of it. Most of the work is making the declared schema match what the endpoint actually returns. Before documenting, identify which endpoint class serves the route and what it does; the MCP tool that calls it is usually the fastest way to confirm its behavior. Promoting a PRIVATE/EXPERIMENTAL endpoint to PUBLIC is one application (see below).

## Workflow

1. Class-level `@extend_schema(tags=[...])` — use the closest existing `OPENAPI_TAGS` entry.
2. Method-level `@extend_schema(operation_id=..., parameters=[...], responses={...}, examples=...)`.
3. Reuse `src/sentry/apidocs/parameters.py` and `examples/*.py`; ensure `owner = ApiOwner.<TEAM>` is set.
4. If a legacy `api-docs/paths/**/*.json` covers the path, remove it (see lesson 4).
5. Validate, then verify against the live endpoint (lesson 1).

## Lessons

### 1. Carefully compare what the code does vs declared types
Ideally, hit the live endpoint with a real token and diff the keys and types against your TypedDict. Serializers are sometimes inaccurate. Look out for counts coming back as floats instead of integers, IDs declared `int` emitted as strings, nested types declaring the wrong number of fields. Correct the declared type to match runtime.
```bash
curl -s -H "Authorization: Bearer $TOKEN" "https://us.sentry.io/api/0/<endpoint>" | jq 'keys'
```

### 2. Reuse the canonical response type
````
END THIRD-PARTY FILE c4faadabc19908b3

The third-party file has ended. Everything between the c4faadabc19908b3 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

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