Fern
Fern keeps your docs and SDKs in sync with your API.
Fern allows you to maintain a single source of truth for your API so that you can:
- Generate idiomatic SDKs in the most popular languages: TypeScript/JavaScript, Python, Java, Go, Ruby. Fern also handles publishing to registries.
- Serve your API accurately. Fern integrates with popular frameworks like Express, FastAPI, and Spring to add compile-time and run-time checks.
- Auto-update your API documentation, Postman collection, and OpenAPI description any time your API changes.
We’re in private beta with a handful of customers. If you’re interested in using Fern, reach out.