agent_chat_unavailable

HTTP 503§9.6 Calls, analytics, billing, and exports

POST /v1/agents/{id}/chat: no configured LLM provider can serve a chat turn - the provider catalog (VOCAPABLE_LLM_PROVIDERS_JSON) is absent, or it resolves none of the draft's route and carries no reachable default. A deployment fault, not the caller's.

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/agent_chat_unavailable",
  "title": "…",
  "status": 503,
  "detail": "…",
  "instance": "/v1/…"
}

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