# not_implemented

> The operation is in the contract but not available on this server yet.

HTTP `501` · `retryable` is `false` · the server's own failure, whatever the request

The contract describes some operations ahead of the server. Calling one of those answers `501`.

**What to do:** use another way to do it for now, and look for the operation in the [changelog](/docs/changelog).

## The response

Every error comes as `application/problem+json`; [Errors](/docs/errors) explains each field.

```json
{
  "type": "https://usekabu.com/docs/errors/not_implemented",
  "title": "Not implemented",
  "status": 501,
  "code": "not_implemented",
  "detail": "…",
  "hint": "…",
  "retryable": false,
  "request_id": "req_…",
  "doc_url": "https://usekabu.com/docs/errors/not_implemented"
}
```