WhatsApp Voice Conversational Agent

A voice-based conversational agent that integrates with WhatsApp Business API to handle voice calls over WebRTC. Demonstrates how to build a bot that automatically answers WhatsApp voice calls and conducts natural conversations using Gemini and Pipecat's SmallWebRTC transport.

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The numbers

latency—

cost / min—

frameworkPipecat

The stack

telephonyWeb Only

speech-to-textDeepgram Nova-2

llmGemini 2.5 Flash

text-to-speechCartesia Sonic-2

System prompt

No prompt published.

Config

config.json

{
  "transport": "SmallWebRTCTransport",
  "webhook_path": "/whatsapp",
  "whatsapp_integration": true
}

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