Why combine Agora and the Voice Agent API

Agora gives you battle-tested WebRTC: low-latency audio routing across 200+ countries, automatic codec negotiation, jitter buffers, NAT traversal, and SDKs for every client platform. The Voice Agent API is the AI brain in one connection.

DIY pipeline behind Agora Voice Agent API behind Agora

Vendors to integrate STT + LLM + TTS (3+)

API keys to rotate 3+

Round trips per turn 3

Turn detection Plug in a separate VAD

Barge-in Implement yourself

Tool calling Wire LLM tools yourself

Voices Pick a TTS vendor

Architecture

The system has three layers:

Parameter Type Description

vad_threshold 0.0–1.0 Voice activity detection sensitivity. Raise for noisy call environments.

min_silence ms Minimum silence before a confident end-of-turn check fires.

max_silence ms Hard cap on silence before forcing end-of-turn.…