Every endpoint under /api/v1/ with request parameters, response schemas, and example payloads. The OpenAPI 3.0 spec is at /api/v1/openapi.json if you want to import it into Postman or generate a client.
Pro Pass
The schema is free to browse. The Pro Pass unlocks live responses
The Pro Pass ($35 one-time) unlocks the 9 endpoints below. Free + Standard Pass callers see 401/403 as documented in the spec.