OpenAPI specification

The whole REST API as an OpenAPI 3.1 document, generated from the endpoints themselves. Import it into Postman or Insomnia, render it with Swagger UI or Redoc, generate a typed client from it, or hand the URL to an assistant — it describes every endpoint, its parameters, its plan requirement and its responses.

No authentication, deliberately: a specification names the endpoints, not the data behind them, and every one of them still refuses a request with no token. Requiring credentials to read it would mean a developer has to be integrated before their tooling can tell them how to integrate.