DocumentationAccess MethodsResponses API

Responses API

OpenAI Responses protocol — usable by Codex and other clients as a wire API.

Endpoint

Base URL	`https://your-router-domain.com/v1`
Endpoint	`POST /v1/responses`

Authentication

Header Authorization: Bearer YOUR_API_KEY

Specify the routing model via the model field in the request body.

curl example

curl https://your-router-domain.com/v1/responses \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.5","input":"Hello"}'

OpenAI Compatible Claude Messages