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Decode Trail Latest Questions

Asked: May 20, 20262026-05-20T16:55:00+00:00 2026-05-20T16:55:00+00:00In: Cybersecurity

Why do my APIs return 401 Unauthorized even though the access token is valid?

Swarnika Gupta
Swarnika Gupta

Token verification succeeds, but the API still rejects requests with a 401.
I’m unsure whether the issue is with the token itself or with how the API enforces permissions.

how can i solve this issue completely?

api-security
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  1. Benedict Pier
    Benedict Pier Begginer
    2026-05-21T06:50:21+00:00Added an answer on May 21, 2026 at 6:50 am

    A valid token only confirms that the caller’s identity has been verified. It does not automatically mean the caller is allowed to access every endpoint. Most APIs enforce authorization rules based on scopes, roles, or audience claims embedded in the token.
    If the token lacks a required scope or if the audience claim doesn’t match what the API expects, the request will be rejected even though authentication succeeded. This is especially common when the same identity provider is used across multiple APIs with different permission models.

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