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Twilio Docs

Programmable Voice

With Twilio, you can quickly make and receive voice calls in your application. We provide the docs, code samples, helper libraries, and developer tools you need on your journey. You bring your imagination. Let's build something amazing together.

Make your first voice call

Take the next steps with Programmable Voice

Get Started
Build your App
Advanced Features
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Twilio servers
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Your app
from flask import Flask

from twilio.twiml.voice_response import VoiceResponse

app = Flask(__name__)



@app.route("/answer", methods=['GET', 'POST'])

def answer_call():

    resp = VoiceResponse()

    resp.say("Twilio's always there when you call!")

    return str(resp)



if __name__ == "__main__":

    app.run()
View complete examples(link takes you to an external page)
3
Twilio's always there when you call!

Take the next steps with Programmable Voice

Get Started
Build your App
Advanced Features

Get Started

With just a few lines of code, you'll make your first outgoing phone call with the Voice API. Add a few more and your app can respond to incoming callers. Choose your programming language to get started.

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// Download the helper library from https://www.twilio.com/docs/node/install

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const twilio = require("twilio"); // Or, for ESM: import twilio from "twilio";

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// Find your Account SID and Auth Token at twilio.com/console

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// and set the environment variables. See http://twil.io/secure

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const accountSid = process.env.TWILIO_ACCOUNT_SID;

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const authToken = process.env.TWILIO_AUTH_TOKEN;

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const client = twilio(accountSid, authToken);

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async function createCall() {

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  const call = await client.calls.create({

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    from: "+15558675310",

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    to: "+15017122661",

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    url: "http://demo.twilio.com/docs/voice.xml",

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  });

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  console.log(call.sid);

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}

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createCall();
Ahoy, World

Make your first call. Jump to a Quickstart in the language of your choice:

PHP
Node
Python
Ruby
Java
C#
Go

Build your App

You've got an idea in mind. Let's get it to production.

Pick the docs that are right for you. These short tutorials, sample apps, and API reference docs will get you from dream to HTTP 200 OK.

Advanced Features

Your application is unique, but you're not alone - we've got the building blocks you need to grow and scale. Use Twilio with your current VoIP system, debug call issues, find the right data, and queue and modify calls. Deploy your app with confidence.

Twilio's Voice Insights takes your apps to the next level and helps you target the right improvements. Surface jitter, mean opinion score, and latency issues while monitoring the carrier and hang-up data you need to improve your service.

Build a Conversational IVR using machine learning and natural language understanding with Conversational Intelligence and Virtual Agent.

(information)

Info

If you are an Australian Consumer customer, Twilio's Critical Information Summary (CIS) can be found here(link takes you to an external page).

Solve problems before they crop up. Protect your users' and employees' privacy in multi-way conversations and quickly match jobs to worker skills and qualifications.

TaskRouter
TaskRouter

Match workers with tasks across voice and other channels

Product documentation
Twilio Studio
Twilio Studio

Don't want to code? Create your Voice app with our visual builder

Product documentation