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

# service_unavailable

> Temporarily unavailable. HTTP 503.

|           |                                                               |
| --------- | ------------------------------------------------------------- |
| HTTP      | `503`                                                         |
| `code`    | `service_unavailable`                                         |
| `type`    | `https://docs.cortex.foundation/problems/service_unavailable` |
| Retryable | yes                                                           |

A dependency the request needs is not configured, or the service is refusing work for now. Chat compaction that cannot summarise fails closed with this code rather than dropping turns.

```json theme={null}
{
  "type": "https://docs.cortex.foundation/problems/service_unavailable",
  "title": "Temporarily unavailable",
  "status": 503,
  "code": "service_unavailable",
  "request_id": "req_…"
}
```

## Related

* [Errors](/reference/errors) - how to branch on `code`, and what not to render from `detail`.
* [Problem catalog](/problems) - every code, its status, and whether retrying helps.
* [Troubleshooting](/getting-started/troubleshooting) - what a message in the product means.