# dependency_unavailable

A required service is temporarily unavailable. Returned with HTTP 503; retrying can succeed.

| Property | Value |
| --- | --- |
| HTTP status | `503` |
| Retryable | Yes |
| `type` | `https://fylane.dev/errors/dependency-unavailable` |

This error is transient. Retry with backoff, reusing the same idempotency key so the retry cannot double-charge you.

Example response

```json
{
  "type": "https://fylane.dev/errors/dependency-unavailable",
  "code": "dependency_unavailable",
  "message": "A required service is temporarily unavailable.",
  "retryable": true,
  "request_id": "req_01JBQ8Z5T7WXK9MNP2RSTVA3C4",
  "docs_url": "https://fylane.dev/docs/errors/dependency-unavailable"
}
```

Quote the `request_id` if you contact support. It is the same value returned in the `X-Request-Id` header and it identifies this exact request in our logs.