not_implemented

HTTP 501 · The route is documented and routed, but the implementation has not landed.

What causes it

The route exists and its contract is published, and the handler behind it is not finished. This is what a scaffolded endpoint returns before the implementation ships.

What to do

Do not retry — it will not start working on the next attempt. Check the changelog for the endpoint’s status. If you are seeing this on an endpoint the changelog says is live, that is a bug worth reporting.

Retry?

No — the same request produces the same answer.

The response

{
  "type": "https://developers.vaki.co/errors/not_implemented",
  "title": "…",
  "status": 501,
  "code": "not_implemented",
  "detail": "…",
  "instance": "/v1/checkout_links"
}

Branch on code, never on title or detail. The full list of codes, and the shape of the problem document, is on Errors.