# unknown_operation

> No such operation or path. Use `tools_search` (MCP) or the OpenAPI document to find the right name.

Source: https://x.builera.app/docs/en/errors/unknown_operation

| | |
|---|---|
| HTTP status | 404 |
| Safe to retry | No |
| Message (fixed, English) | Unknown operation. |

## What to do {#what-to-do}

No such operation or path. Use `tools_search` (MCP) or the OpenAPI document to find the right name.

## Error shape {#body}

```json
{
  "code": "unknown_operation",
  "message": "Unknown operation.",
  "retryable": false,
  "request_id": "req_…"
}
```

[All error codes](/docs/en/errors)