Overview of API References
Fern generates interactive API Reference documentation from an OpenAPI specification, Fern Definition, or other API formats. Endpoints, type schemas, code snippets, and AI-generated examples are all populated automatically. Users can try requests directly from the docs with the API Explorer.
Pick your API type
REST
OpenAPI spec or Fern Definition
gRPC
Protocol Buffer .proto files
WebSocket
AsyncAPI spec or Fern Definition
Webhook
OpenAPI spec or Fern Definition
OpenRPC
OpenRPC specification
Library
Python or C++ source code
