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Verify Node.js Express Quickstart


With just a few lines of code, your Node.js/Express application can verify phone numbers and add an additional layer of security with Twilio Verify.

This Node.js Verify Quickstart will teach you how to do this using our Verify REST API, the Twilio Node.js helper library, and Express.js(link takes you to an external page) to ease development.

In this Quickstart, you will learn how to:

  1. Sign up for Twilio
  2. Set up your development environment
  3. Send your first SMS phone verification
  4. Check verification codes
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Short on time? Spin up a low-code, fully editable verification demo in less than 2 minutes using Twilio's Code Exchange and Quick Deploy here(link takes you to an external page).


Sign up for Twilio

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If you already have a Twilio account, you're all set here! Feel free to jump to the next step.

Before you can send an SMS from Node.js, you'll need to sign up for a Twilio account(link takes you to an external page) or sign into your existing account.

You can sign up for a free Twilio trial account here(link takes you to an external page).

  • When you sign up, you'll be asked to verify your personal phone number. This helps Twilio verify your identity and also allows you to send test verification messages to your phone from your Twilio account while in trial mode. This phone verification step is exactly what you'll learn how to build in this tutorial!
  • Once you verify your number, you'll be asked to create a project. For the sake of this tutorial, you can click on the "Learn and Explore" template. Give your project a name, or just click "skip remaining steps" to continue with the default.
  • Once you get through the project creation flow, you'll arrive at your project dashboard in the Twilio Console(link takes you to an external page) . This is where you'll be able to access your Account SID, authentication token, create a verification service, and more.

Do I need a phone number?

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If you've sent SMS with Twilio in the past, you might remember needing to buy a phone number. With Twilio Verify, we take care of that for you! The Verify API selects the best routes for quickly and reliably delivering verification codes globally.

Verify uses Services for configuration. To send a Verify API request you will need both your Twilio Credentials and a Service SID. You can create and update a Service in two ways:

  1. In the Verify Console(link takes you to an external page)
  2. With the Verify API

Services can be used to edit the name (which shows up in the message template), set the code length (4-10 characters), enable settings like the "do not share warning" and more.

Now that you have a Twilio account and a verification service, you can start writing some code!

To make things even easier, we'll next install Twilio's official helper library for Node.js applications.


Install Node.js and the Twilio Helper Library

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If you've gone through one of our other Node.js Quickstarts already and have Node.js and the Twilio Node.js helper library installed, you can skip this step and get straight to sending your first verification.

To start a phone verification, you'll need to have Node.js and the Twilio Node.js helper library installed.

Send an SMS verification code

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Sends a one-time passcode to a user's phone number

Node.js

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// Download the helper library from https://www.twilio.com/docs/node/install
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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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const verification = await client.verify.v2
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.services("VAaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
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.verifications.create({
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channel: "sms",
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to: "+15017122661",
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});
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console.log(verification.status);

Output

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{
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"sid": "VEaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"service_sid": "VAaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"account_sid": "ACaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"to": "+15017122661",
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"channel": "sms",
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"status": "pending",
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"valid": false,
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"date_created": "2015-07-30T20:00:00Z",
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"date_updated": "2015-07-30T20:00:00Z",
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"lookup": {},
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"amount": null,
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"payee": null,
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"send_code_attempts": [
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{
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"time": "2015-07-30T20:00:00Z",
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"channel": "SMS",
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"attempt_sid": "VLaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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}
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],
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"sna": null,
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"url": "https://verify.twilio.com/v2/Services/VAaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/Verifications/VEaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
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}

Check a verification code

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Checks the one-time passcode sent to the user. The provided code is correct if the response 'status' parameter is 'approved'.

Node.js

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// Download the helper library from https://www.twilio.com/docs/node/install
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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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const verificationCheck = await client.verify.v2
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.services("VAaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
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.verificationChecks.create({
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code: "123456",
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to: "+15017122661",
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});
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console.log(verificationCheck.status);

Output

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{
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"sid": "VEaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"service_sid": "VAaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"account_sid": "ACaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
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"to": "+15017122661",
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"channel": "sms",
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"status": "approved",
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"valid": true,
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"amount": null,
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"payee": null,
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"sna_attempts_error_codes": [],
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"date_created": "2015-07-30T20:00:00Z",
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"date_updated": "2015-07-30T20:00:00Z"
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}

Next we'll get this up and running in a full example project.

Install Node.js and Yarn

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See the Node.js website(link takes you to an external page). As well as Yarn(link takes you to an external page).


Clone and Setup the Verification Application

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Start by cloning our Node.js repository(link takes you to an external page).


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git clone https://github.com/TwilioDevEd/verify-v2-quickstart-node.git

If you don't have git installed or prefer to download the source code you can grab a zip file of the project here(link takes you to an external page).


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cd verify-v2-quickstart-node
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yarn install

Copy .env.example to .env. This is where we'll store sensitive data in environment variables(link takes you to an external page).


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cp .env.example .env

Modify your new .env file with your own TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN, and VERIFICATION_SID that you can find in your Twilio Console.

Run the application


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yarn start

If your credentials are set up correctly, you'll soon get a message that the app is up!


Use the Node Twilio Verify Demo

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Navigate to http://localhost:3000/register(link takes you to an external page). You should see a registration form that looks like this:

sign up form with phone verification.

Enter your phone number and choose which channel to request verification over. Finally hit the green Sign Up button and wait. You'll either receive a phone call or an SMS with the verification token. If you requested a phone call, you may need to interact to proceed (entering a number on the phone keypad) as an additional security feature.

Enter the token into the Verification entry form and click Verify:

verification entry form.

And with that, your demo app is protected with Twilio's Phone Verification!


Your demo app is now keeping fraudulent users from registering with your business and polluting your database. Next, check out all of the variables and options available to you in the Verify API Reference.

After that, check out adding additional verification channels supported by the Verify API like:

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Lastly, to protect your service against fraud, view our guidance on Preventing Toll Fraud when using Verify.


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