favi authentication (auth docs)
favi authentication docs for the public favicon HTTP API at getfavi.vercel.app. The API is open: no API keys, OAuth, cookies, sessions, or login. Do not send an Authorization header.
What to send
Send JSON to POST /api/export with Content-Type: application/json. GET endpoints take query parameters only. Production rate-limits by client IP at the Vercel WAF; over the limit you receive HTTP 429 (prefer RFC 9457 problem+json when the app handles the error; wait and retry).