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

# Errors

> Error responses and how to handle them.

Errors return an HTTP status code and, except as noted below, a JSON body:

```json theme={null}
{
  "code": "NOT_FOUND",
  "status": 404,
  "message": "Order not found."
}
```

| Error                         | Meaning                                                                                                                      |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------- |
| `400 BAD_REQUEST`             | The request can't be processed.                                                                                              |
| `401 UNAUTHORIZED`            | The API key is missing, invalid or revoked.                                                                                  |
| `404 NOT_FOUND`               | The resource doesn't exist.                                                                                                  |
| `409 CONFLICT`                | The `requestId` conflicts with an earlier request. See [Idempotency](/idempotency).                                          |
| `422 INPUT_VALIDATION_FAILED` | The body is invalid. `data.fieldErrors` lists problems with fields, and `data.formErrors` problems with the body as a whole. |
| `503 SERVICE_UNAVAILABLE`     | A temporary outage. Retry with backoff.                                                                                      |

A malformed JSON body returns `400` and a body over 1 MB returns `413`, both as plain text.

Retry `5xx` errors with backoff and the same `requestId`. Retry a `409` for a request that's still starting, unchanged, after a short delay. Fix the request before retrying any other `4xx` error.