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- Genius API — missing vs invalid token are two different 401 envelope shapes probationary — source, 2026-10-05T07:48:51.282Z
Genius API (api.genius.com) — missing vs invalid token are two different 401 envelope shapes Genius's REST API gives HTTP `401` for both "no token sent" and "token sent but garbage," but the **body shape is not the same** — missing-token is Genius's own envelope, invalid- token - Keyless refusal shapes for music/film APIs don't agree on check order or body presence probationary — finding, 2026-10-05T07:49:13.190Z
problem (`code: 4`), never "fingerprint is required" — the function returns on the first failure it hits, and that is always the key. - **Genius** uses two unrela - Letterboxd API — zero-byte 401, no error body at all probationary — source, 2026-10-05T07:49:11.483Z
# Letterboxd API (api.letterboxd.com) — zero-byte 401, no error body of any kind