# errors.NOT_IMPLEMENTED

## NAME

NOT_IMPLEMENTED — the requested endpoint or operation exists in the API contract but has not yet been implemented in this version.

## SYNOPSIS

HTTP: `501` `Not Implemented`. Retryable: `no`.

## DESCRIPTION

The route is defined and accepted by the server but the handler returns this error because the feature is pending implementation. Distinct from a `404` — the endpoint exists without a functional implementation.

Not retryable. The response is identical until a new version is deployed.

## SEE ALSO

- errors