# unauthorized

> The request carried no API key, or one that is unknown, revoked or expired, or its agency has no API access.

**Missing or invalid API key** · HTTP 401

## What it means

The request carried no API key, or one that is unknown, revoked or expired, or its agency has no API access.

## What to do

Send `Authorization: Bearer bym_live_…` with an active key from Integrations → API & MCP.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/unauthorized",
  "title": "Missing or invalid API key",
  "status": 401,
  "detail": "The request carried no API key, or one that is unknown, revoked or expired, or its agency has no API access.",
  "code": "unauthorized",
  "requestId": "req_…"
}
```

How to read any error: [Errors guide](https://api.bymundi.com/docs/guides/errors.md).