settle_out_of_band_unconfirmed
The same route when Stripe did not answer the invoice re-read or the pay_invoice_out_of_band call - a transient or timeout class, not a definite refusal. Whether the pay applied is unknown.
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/settle_out_of_band_unconfirmed",
"title": "…",
"status": 502,
"detail": "…",
"instance": "/v1/…"
}