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Generate structured API documentation (endpoints, parameters, request and response examples, authentication, and error codes) in a shape developers can actually use.
Generate API documentation from code. Paste Express routes, FastAPI endpoints, Go handlers, or TypeScript interfaces and get structured Markdown docs or OpenAPI YAML.
API documentation appears here...
The part of API documentation that gets used most and written least is the error catalogue. Every integrator hits a 400 before they hit a 200, and documentation that lists only successful responses leaves them guessing at what the error body looks like and which codes are retryable. Documenting failure modes properly is the single biggest improvement most API docs could make.
The second is realistic examples. A response example showing id: 1, name: string teaches nothing about the actual shape. A real payload with real-looking values answers ten questions at once: date format, null handling, nesting, pagination shape.