meeting_calendar_unavailable
The provider refused (reconnect: 409) or did not answer (503) the availability check; nothing was booked.
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/meeting_calendar_unavailable",
"title": "…",
"status": "…",
"detail": "…",
"instance": "/v1/…"
}