Interactive API Docs — Swagger UI + Redoc + /openapi.json

OpenAPI 3.1 spec at /openapi.json covering POST /v1/process, GET /v1/usage, POST /v1/keys
Swagger UI at /docs/api with dark-mode styling and Try It Out enabled
Redoc render at /docs/api/redoc for spec-first browsing
Both endpoints added to sitemap + IndexNow; footer Developers group links all four surfaces

API Reference → Redoc → OpenAPI JSON →