line-voice-agent

You can build production voice agents by combining LLM reasoning, tool execution, and multi-agent handoffs using the Line SDK. It handles real-time audio orchestration, STT, TTS, and telephony workflows for scalable deployment.

To deploy a telephony voice agent to Cartesia Line, you need Python, the Line SDK, and a Cartesia API key. You must create a Line agent project, implement main.py, configure cartesia.toml, and deploy to start handling live calls.

Yes, multi-agent handoffs and call transfers are supported for IVR workflows. The framework formalizes patterns for loopback, passthrough, and handoff tools, allowing complex coordination across multiple agents during live calls.

Real-time audio orchestration works by deploying to Cartesia Line, which auto-scales STT, TTS, and telephony components. The Line SDK coordinates built-in tools like web search, DTMF, and call transfers synchronously during live audio calls.

Yes, the Line SDK voice agent supports built-in tools for DTMF and web search. These tools are integrated into the voice agent workflow alongside real-time audio orchestration, enabling interactive telephony and dynamic information retrieval during calls.

The best way to scale voice agents for live call handling is deploying to Cartesia Line, which provides auto-scaling for STT, TTS, telephony, and audio orchestration. This production setup supports multi-agent handoffs and tool execution seamlessly.