API Playground
Reduce “time to 200” by allowing users to make real calls to your API from right within the API Reference.
Fern’s API Playground allows users to make authenticated requests to your API without ever leaving your documentation.
Auto-populate with examples
Fern will automatically populate the fields of the endpoint with the values set in your API specification.
Authenticated sessions
Once a user sets their authentication credentials once, their credentials persist throughout their entire exploration.
Authentication credentials are only stored client-side using cookies. No sensitive user information is collected or stored.
Multiple environments
Allow users to test their calls in a sandbox environment or select the environment relevant to them. Users can switch between multiple environments. Once they’ve selected their environment, it persists throughout their entire exploration.
WebSocket Playground
For APIs that support WebSocket connections, the API Playground includes a WebSocket-specific Playground. The WebSocket Playground also allows users to establish a connection with the API, and send/receive messages in real-time.