> ## 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.

# APP_TOKEN_REQUIRED

> HTTP 401, from every operation of the Admin API.

Its problem `type`: `https://developers.tassyir.io/errors/app-token-required`.

## What to do

HTTP 401. No `Authorization: Bearer` header. Send the installation's access token.

## Answered by

Every operation of the Admin API, with HTTP 401.

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


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