CREDIT_UNAVAILABLE Cannot check or hold credits right now

HTTP status
503
Credit
No credit taken

Meaning

Credits could not be checked or held, so nothing was done (no bank was asked, no credit was used).

Fix

Wait for Retry-After, then resend with the same Idempotency-Key.

Example response

{
  "type": "https://checkslip.com/problems/credit-unavailable",
  "title": "Cannot check or hold credits right now",
  "status": 503,
  "code": "CREDIT_UNAVAILABLE",
  "instance": "01a18600-0000-7000-8000-000000000000"
}