Errors › 401 Authentication

unauthenticated

No valid bearer key or session cookie was found on the request.

type authentication_error status 401

What happened

The `Authorization` header was missing, malformed, or carried a key Clement doesn't recognize. Browser callers may have lost their session cookie (logged out, cleared cookies, or visited the wrong subdomain).

How to recover

Set `Authorization: Bearer cl_live_…`. If the key was revoked, see `api_key_revoked` and rotate.


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