purchase_payment_pending
HTTP 503§9.10 Agreements
Signed acquisition payment notification requires read-only verification or reconciliation of the original order. Preserve its checkout identity and retry verification; this does not authorize another charge or grant service.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/purchase_payment_pending",
"title": "…",
"status": 503,
"detail": "…",
"instance": "/v1/…"
}