Overview of OpenRPC extensions | Fern Documentation

Fern supports a variety of OpenRPC extensions that enhance your API specification and generate higher-quality SDKs.

You can apply these extensions in two ways: by overlaying them in separate override files or by embedding them directly in your OpenRPC specification. See Overrides for more information.

Available extensions

The table below shows all available extensions and links to detailed documentation for each one.

Extension	Description
`x-fern-ignore`	Skip reading specific methods or schemas
`x-fern-examples`	Provide additional examples for better SDK documentation
`x-fern-availability`	Mark features as available in specific SDK versions
`x-fern-server-name`	Specify custom names for servers
`x-fern-sdk-group-name`	Group related methods in the SDK
`x-fern-audiences`	Filter methods by audience
`x-fern-sdk-method-name`	Customize SDK method names

Request a new extension

If there’s an extension you want that doesn’t already exist, file an issue to start a discussion about it.