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Communication · Voice Processing

Voice Call MCP Server logo

Voice Call MCP Server

lukaskai/voice-call-mcp-server

A Model Context Protocol (MCP) server that enables Claude and other AI assistants to initiate and manage voice calls using Twilio and OpenAI (GPT-4o Realtime model).

View on GitHub

Install

Client configuration

{
  "mcpServers": {
    "voice-call": {
      "command": "node",
      "args": [
        "/path/to/your/mcp-new/dist/start-all.cjs"
      ],
      "env": {
        "TWILIO_ACCOUNT_SID": "<TWILIO_ACCOUNT_SID>",
        "TWILIO_AUTH_TOKEN": "<TWILIO_AUTH_TOKEN>",
        "TWILIO_NUMBER": "<TWILIO_NUMBER>",
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "NGROK_AUTHTOKEN": "<NGROK_AUTHTOKEN>"
      }
    }
  }
}

Environment variables

TWILIO_ACCOUNT_SIDTWILIO_AUTH_TOKENTWILIO_NUMBEROPENAI_API_KEYNGROK_AUTHTOKEN
Author
@lukaskai
Category
Communication, Voice Processing
License
MIT
Updated
Oct 6, 2026

About Voice Call MCP Server

Use this as a base to kick-start your AI-powered voice calling explorations, save time and develop additional functionality on top of it.

Features

  • Make outbound phone calls via Twilio

  • Process call audio in real-time with GPT-4o Realtime model

  • Real-time language switching during calls

  • Pre-built prompts for common calling scenarios (like restaurant reservations)

  • Automatic public URL tunneling with ngrok

  • Secure handling of credentials

Details on this page are taken from the project's README. Open README

Supported clients

Clients mentioned in this server's README:

View all
Claude Desktop logo

Claude Desktop

Desktop · Freemium · Proprietary

Anthropic's official Claude AI desktop application. Supports MCP servers to extend functionality.

WindowsMacOS

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