OptionalapiAccount API key — used for key-scoped operations when no application credential pair is supplied.
OptionalapiAccount API secret — paired with apiKey.
OptionalapplicationVonage Application ID (UUID) — the JWT-auth identity for the Voice API.
OptionalcostEstimated carrier cost rate per minute in reporting currency (e.g. 0.015 for 1.5 cents/min). Used to compute Interaction.CostEstimate at call end. Defaults to 0.015 if unset.
OptionaleventEvent-webhook URL Vonage posts call lifecycle events to. Defaults to <public URL>/telephony/vonage/event
(the route that ends the session when a call is busy / unanswered / failed / completed).
OptionalinboundEmail of the user INBOUND calls run as. Required for inbound calls: if unset, unknown, inactive, or the system user, the call is rejected (there is deliberately no fallback to a privileged user). Point it at a dedicated least-privilege account.
OptionalmaxMaximum length of one phone call in seconds (default 1800). The session is stopped at the cap.
OptionalmaxMost phone calls (every carrier together, both directions) the server will carry at once (default 25). Keep this at or below the realtime model plan's concurrent-session limit: past the cap an inbound caller hears a polite "all agents are busy" and an outbound call is refused, instead of every call degrading.
The publicly reachable wss://…/telephony/vonage/media URL the call's connect NCCO opens.
OptionalonWhat to do when a machine answers an outbound call — Vonage's machine_detection (default 'hangup').
OptionaloutboundOutbound destination policy and per-user rate limit applied to every Place*Call mutation.
OptionalprivateThe application's RSA private key (PEM) used to sign Voice-API JWTs.
OptionalsignatureVonage account signature secret — HMAC key for signed-request sig AND HS256 webhook-JWT verification.
OptionaltransferThe places the agent may transfer a live call to, by name. Empty or absent means the agent cannot transfer at all, even on a carrier that supports it: the agent never names a free-form number.
Vonage Voice + WebSocket-media telephony binding configuration.