from_uri and to_uri—not the former from/to fields—and voice_agent_id rather than application_id.
The returned call records its state, direction, optional Voice Agent ID, selected trunk and endpoint IDs, and lifecycle timestamps. Depending on routing or provider conditions, origination can fail; handle the API error and inspect subsequent call status.
Leamout enforces configured route admission and organization runtime allowances when admitting eligible Voice Agent calls.