Fern
Docs, SDKs, and CLIs for your API from one source of truth
Fern is a developer tooling platform that generates API documentation, SDKs in multiple languages, and CLI tools from a single OpenAPI or other API specification. It supports modern API protocols including REST, WebSockets, GraphQL, and gRPC. The platform targets companies building APIs and offers enterprise features like SSO, RBAC, self-hosting, localization, and SOC 2 compliance.
Users provide an API spec (OpenAPI, GraphQL, AsyncAPI, gRPC) and Fern automatically generates synchronized docs, client SDKs, and a CLI from that single source of truth.
API-first companies and developer teams building and maintaining APIs
Background.
- Status
- launched
- Business model
- freemium
- Company
- Fern
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