Our Client API specification is defined in Fern, which is a more powerful alternative to OpenAPI. Fern definition allows us to produce fully type-safe code and brings a higher level of reliability to our systems. We also have an OpenAPI spec, which is generated by Fern.

Fern Definition

This is where we define the interface of the Client API that our entire architecture relies upon.

OpenAPI Spec

This is the Fern-generated OpenAPI (v3) specification for the Client API.