> ## Documentation Index
> Fetch the complete documentation index at: https://developers.tassyir.io/llms.txt
> Use this file to discover all available pages before exploring further.

# UNAUTHORIZED

> A refusal with HTTP 401 that carries no more specific code.

Its problem `type`: `https://developers.tassyir.io/errors/unauthorized`; its `title`: Unauthorized.

## What to do

Send a valid access token as Authorization: Bearer tsy\_at\_…; get a new one from POST /apps/oauth/token.

## Answered by

The code of a refusal with HTTP 401 that carries no more specific code. Any operation may answer it.

The shape of every problem, and how `@tassyir/app` reports it: [Errors](/guides/errors).


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