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by Alhwyn
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TypeScript
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AI Call System

A Node.js application that enables AI-powered phone calls using Twilio and OpenAI's Realtime API.

Features

  • 🤖 AI-powered phone calls with natural conversation
  • 📞 Real-time voice interaction using OpenAI's Realtime API
  • 🔄 Interruption handling for natural conversation flow
  • 📊 Call status tracking and logging
  • 🚀 Easy-to-use functions and CLI interface

Setup

  1. Install dependencies:
    npm install
  2. Create a .env file with your credentials:
    # Twilio credentials TWILIO_ACCOUNT_SID=your_twilio_account_sid TWILIO_AUTH_TOKEN=your_twilio_auth_token TWILIO_PHONE_NUMBER=your_twilio_phone_number TO_PHONE_NUMBER=number_to_call # OpenAI credentials OPENAI_API_KEY=your_openai_api_key # Server configuration (optional) PORT=5050
  3. Make sure your Twilio phone number is configured for voice calls and webhooks.

Usage

Method 1: Using the Functions Directly

import { makeAICall, startAIServer } from "./src/make_call"; // Start the server await startAIServer(); // Make an AI call const callResult = await makeAICall(); console.log("Call SID:", callResult.sid);

Method 2: Using the CLI

Start the server:

npx tsx src/cli.ts server

Make a call:

npx tsx src/cli.ts call

Make a call to a specific number:

npx tsx src/cli.ts call +1234567890

Method 3: Using the Example

npx tsx src/example.ts

API Functions

makeAICall(toNumber?, fromNumber?, serverUrl?)

Initiates an AI call using Twilio.

Parameters:

  • toNumber (optional): Phone number to call (defaults to TO_PHONE_NUMBER from env)
  • fromNumber (optional): Twilio phone number to call from (defaults to TWILIO_PHONE_NUMBER from env)
  • serverUrl (optional): URL of your server (defaults to http://localhost:5050)

Returns: Promise with call details including SID, status, etc.

startAIServer(port?)

Starts the server that handles AI calls and webhooks.

Parameters:

  • port (optional): Port to run the server on (defaults to 5050)

How It Works

  1. Call Initiation: The makeAICall function creates a Twilio call to the specified number
  2. Webhook Handling: When the call connects, Twilio sends a webhook to /incoming-call
  3. Media Stream: The call connects to a WebSocket stream for real-time audio
  4. AI Processing: Audio is sent to OpenAI's Realtime API for processing
  5. Response: AI responses are converted to speech and sent back through the call

Environment Variables

VariableDescriptionRequired
TWILIO_ACCOUNT_SIDYour Twilio Account SIDYes
TWILIO_AUTH_TOKENYour Twilio Auth TokenYes
TWILIO_PHONE_NUMBERYour Twilio phone numberYes
TO_PHONE_NUMBERDefault number to callYes
OPENAI_API_KEYYour OpenAI API keyYes
PORTServer port (default: 5050)No

Development

Type checking:

npm run type-check

Formatting:

npm run format

Linting:

npm run lint:fix

Troubleshooting

  1. "Missing Twilio credentials": Make sure all required environment variables are set in your .env file
  2. "Call failed": Check that your Twilio phone number is configured for voice calls
  3. "Server not accessible": Ensure your server is publicly accessible for Twilio webhooks (use ngrok for local development)

Local Development with ngrok

For local development, you'll need to expose your local server to the internet:

# Install ngrok npm install -g ngrok # Start your server npx ts-node src/cli.ts server # In another terminal, expose your server ngrok http 5050 # Use the ngrok URL in your .env file or when calling makeAICall

This server cannot be installed

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security - not tested
F
license - not found
-
quality - not tested

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

A deployable MCP server on Cloudflare Workers that can be accessed from Claude Desktop or Cloudflare AI Playground, allowing users to create and use custom AI tools without authentication.

  1. Features
    1. Setup
      1. Usage
        1. Method 1: Using the Functions Directly
        2. Method 2: Using the CLI
        3. Method 3: Using the Example
      2. API Functions
        1. makeAICall(toNumber?, fromNumber?, serverUrl?)
        2. startAIServer(port?)
      3. How It Works
        1. Environment Variables
          1. Development
            1. Troubleshooting
              1. Local Development with ngrok

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