twilio-api

Twilio API - Comprehensive Communication Platform

When to Use This Skill

Use this skill when working with Twilio's communication APIs for:

• SMS/MMS Messaging - Send and receive text messages programmatically
• Voice Communication - Build voice calling applications with TwiML
• Phone Number Management - Search, purchase, and configure phone numbers
• Webhook Integration - Handle real-time events and delivery notifications with TwiML responses
• Two-Way SMS Conversations - Build interactive SMS experiences
• Bulk SMS Sending - Send messages to multiple recipients with rate limiting
• Message Scheduling - Schedule messages for future delivery
• Production Deployment - Deploy messaging features with error handling and monitoring
• A2P 10DLC Registration - Register brands and campaigns for US A2P messaging compliance
• Provider-Agnostic Architecture - Build systems that support multiple SMS providers (Twilio + Telnyx)

This skill applies to building communication features in applications, setting up SMS notification systems, creating voice IVR systems, or integrating telephony capabilities.

Quick Reference

1. Send Simple SMS (Node.js SDK)

const twilio = require('twilio');

const client = twilio(
  process.env.TWILIO_ACCOUNT_SID,
  process.env.TWILIO_AUTH_TOKEN
);

async function sendSMS(to, from, body) {
  const message = await client.messages.create({
    to: to,
    from: from,
    body: body
  });
  return message;
}

// Usage
await sendSMS('+14155552671', '+14155559999', 'Hello from Twilio!');

2. Send SMS with HTTP (No SDK)

const https = require('https');

function sendSMS(to, from, body) {
  const accountSid = process.env.TWILIO_ACCOUNT_SID;
  const authToken = process.env.TWILIO_AUTH_TOKEN;

  const auth = Buffer.from(`${accountSid}:${authToken}`).toString('base64');

  const postData = new URLSearchParams({
    To: to,
    From: from,
    Body: body
  }).toString();

  const options = {
    hostname: 'api.twilio.com',
    port: 443,
    path: `/2010-04-01/Accounts/${accountSid}/Messages.json`,
    method: 'POST',
    headers: {
      'Authorization': `Basic ${auth}`,
      'Content-Type': 'application/x-www-form-urlencoded',
      'Content-Length': postData.length
    }
  };

  return new Promise((resolve, reject) => {
    const req = https.request(options, (res) => {
      let data = '';
      res.on('data', (chunk) => { data += chunk; });
      res.on('end', () => resolve(JSON.parse(data)));
    });

    req.on('error', reject);
    req.write(postData);
    req.end();
  });
}