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

# unauthorized

> The access token is missing, invalid, or expired.

| Status | Type |
| - | - |
| `401` | `authentication_error` |

The request had no `Authorization: Bearer <access_token>` header, or its token
is invalid or expired.

## How to fix

Exchange your client credentials for a new token at `POST /oauth/token`.

See [Authentication](https://docs.nova.net/introduction.md#authentication).


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.