> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt.

## OpenAPI spec endpoints

api-reference, ai

Your Fern docs site now serves your raw OpenAPI 3.1 specification at `/openapi.json` and `/openapi.yaml`. Download it for SDK generation, contract testing, or importing into tools like Postman. The spec is also linked from your site's `llms.txt`, so AI coding assistants can discover and use it automatically.

Read the docs