API Documentation Writer (OpenAPI Format)

Who This Is For

Backend developers, API designers, and technical writers who need to document REST API endpoints quickly and consistently.

What Problem It Solves

Poor API documentation slows down integration partners, causes support tickets, and frustrates developers. This prompt generates OpenAPI-compatible documentation that covers the full contract of an endpoint — parameters, request body, response schema, and error codes — all in a consistent format.

Example Use Cases

• Documenting a new payment endpoint before handing it off to a front-end team
• Generating API docs for a public-facing webhook endpoint
• Retroactively documenting an existing endpoint for an SDK team

What to Expect

Complete endpoint documentation including YAML-formatted OpenAPI spec, human-readable description, request/response examples in JSON, and a curl command for quick testing.