receptionist_not_purchasable
The AI receptionist's two licensed Prices are not both wired in this deployment: VOCAPABLE_STRIPE_RECEPTIONIST_BASE_PRICE_ID (the first connection) or VOCAPABLE_STRIPE_RECEPTIONIST_CONNECTION_PRICE_ID (each additional one) is unset, so inbound answering connections cannot bill.
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/receptionist_not_purchasable",
"title": "…",
"status": 409,
"detail": "…",
"instance": "/v1/…"
}