phone-agent

You can automate real-time AI voice calls with Twilio by deploying a FastAPI backend that handles Twilio webhooks, processes audio streams via websockets, and generates AI responses using OpenAI and ElevenLabs.

You need API keys for Twilio, Deepgram, OpenAI, and ElevenLabs to handle call routing, speech transcription, conversational AI, and text-to-speech generation for the phone agent.

Yes, you need a tool like ngrok to expose your local FastAPI server publicly so Twilio can send inbound call webhooks and audio streams to your AI phone agent.

Yes, the phone agent supports outbound call initiation for task-based automation, allowing the AI conversational agent to make calls and interact with recipients using natural language.

Speech-to-text transcription during an AI phone call works by streaming caller audio via websockets to Deepgram, which transcribes the speech in real-time for OpenAI to process and respond.

Limitations of using FastAPI for conversational AI phone automation include the need for continuous public network exposure for Twilio webhooks and managing real-time websocket connections for low-latency audio streaming.