| 400 | Bad request | The request was invalid, missing parameters, or incorrectly formatted. |
| 401 | Unauthorized | The request did not include a valid x-api-key header. |
| 403 | Forbidden | The API key is valid, but the user or role does not have permission for this operation. |
| 404 | Not found | The requested resource does not exist or is not accessible. |
| 405 | Method not allowed | The HTTP method is not supported on this endpoint. |
| 409 | Conflict | A conflict occurred, such as attempting to create a resource that already exists. |
| 422 | Unprocessable entity | Validation failed for one or more fields. The data object will contain details. |
| 423 | Service inactive | The service or workspace is disabled (e.g., expired subscription). Check the dashboard or contact support. |
| 426 | Plan limit exceeded | The user’s plan quota has been reached (e.g., too many items created). Upgrade or manage usage before retrying. |
| 429 | Too many requests | Rate limit exceeded (50 requests per second per IP). Implement retries with exponential backoff. |