Calls
Realtime media session (web)
Opens a short-lived full-duplex media session on an active call. Body: { mode: "talk" | "listen" } — talk sends YOUR audio and receives the peer's; listen only receives. Returns { wsUrl, token, expiresInSeconds }: connect a WebSocket to wsUrl and exchange RAW binary PCM16 little-endian audio frames (plain WebSocket transport, NOT WebRTC; single-use token, ~2 min). Web numbers ONLY — Meta → 400 FEATURE_NOT_SUPPORTED.
**Requires a number-scoped key.**
POST
Realtime media session (web)