not_found

HTTP 404 · No resource at this path.

What causes it

The generic not-found code, for paths and resources without a more specific code of their own.

What to do

Check the path and the identifier.

Retry?

No — the same request produces the same answer.

The response

{
  "type": "https://developers.vaki.co/errors/not_found",
  "title": "…",
  "status": 404,
  "code": "not_found",
  "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.