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POST
Start Call
string
required
The agent ID. Example: agent_abc123
object
Override welcome config for this session.
object
Override voice config for this session.
string[]
Override enabled tools for this session.
string
Language code for TTS/STT.
string
Preferred agent region: "eu", "ap", or "us".

Request

Response

Use the token and wsUrl to connect via the WebRTC SDK for browser-based calls.

Demo Call

For unauthenticated demo calls (rate-limited, no auth required):
Available demo voices: "default", "british-male", "friendly-female", "confident-male". Response:
  • A payment method is required to start web test calls (demo calls are exempt).
  • Suspended workspaces cannot start calls.
  • The agent must have a non-empty prompt.
  • Demo calls are limited to a maximum duration and concurrent call limit.