The documentation site covers details about the various Network APIs exposed in the Radix stack.
The current Gateway API schema of the foundation Gateway is available on Redocly.
The Gateway API schema source-of-truth lives in this repository as an Open API definition in gateway-api-schema.yaml.
The Gateway Service uses the openapi-generator to generate models and clients against the Gateway API spec and the Core API spec. More information can be found in the generation folder README.