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A sample backend that demonstrates how to generate a Virgil JWT and Twilio token used for authentication with the Virgil and Twilio services

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Twilio Sample Backend for Node.js

This repository contains a sample backend code that demonstrates how to combine Virgil and Twilio JWT generation, which are used for authentication with the Virgil and Twilio services.

Do not use this authentication in production. Requests to a /virgil-jwt and /twilio-jwt endpoints must be allowed for authenticated users. Use your application authorization strategy.


Set up and run demo


Clone the repository from GitHub.

$ git clone

Get Virgil Credentials

If you don't have an account yet, sign up for one using your e-mail.

You can download a ready-to-use .env file

  1. Navigate to the Virgil Dashboard -> Your Application -> E3Kit Section.
  2. Generate
    in the .env file section.
  3. Download the generated file, paste it into the project root folder and rename it to

Or you can add the parameters manually:

To generate a Virgil JWT the following values are required:

| Variable Name | Description | |-----------------------------------|--------------------------------| | APPID | ID of your Virgil Application. | | APPKEY | Private key of your App that is used to sign the JWTs. | | APPKEYID | ID of your App Key. A unique string value that identifies your account in the Virgil Cloud. |

  1. Copy and rename
  2. Create Application in the Virgil Dashboard, copy its
    to the
  3. Create App Key and save its private key value to
    line in the
  4. Copy ID of the created key to
    line in the

Get Twilio Credentials

To generate a Twilio JWT the following values are required:

| Variable Name | Description | |-----------------------------------|--------------------------------| | TWILIOACCOUNTSID | Your primary Twilio account identifier - find this in the console here. | | TWILIOAPIKEYSID | SID of Twilio Api Key. Used for authentication on Twilio services. Generated with TWILIOAPISECRET| | TWILIOAPISECRET | Twilio API key secret: generate one here | | TWILIOSERVICE_SID | A service instance where all the data for our application is stored and scoped. Generate one in the console here. |

Add this parameters to your


Install Dependencies and Run the Server

$ npm install
$ npm run start

Now, use your client code to make a request to get a JWT from the sample backend that is working on http://localhost:3000.

Along with the backend we provide a demonstration of a simple client chat interacting with Virgil API, which you can see if you navigate to http://localhost:3000 at your browser. The sample chat code is located in the the


Demo screenshot


/authenticate endpoint

This endpoint is an example of users authentication. It takes user

and responds with unique token.
POST https://localhost:3000/authenticate HTTP/1.1
Content-type: application/json;

{ "identity": "string" }


{ "authToken": "string" }

/virgil-jwt endpoint

This endpoint checks whether a request is authenticated by an authorization header. It takes user's

, finds related user identity and generates a
(which is JSON Web Token) with this
in a payload. Use this token to make authorized API calls to Virgil Cloud.
GET https://localhost:3000/virgil-jwt HTTP/1.1
Content-type: application/json;
Authorization: Bearer 


{ "virgilToken": "string" }

/twilio-jwt endpoint

Same as Virgil token endpoint Twilio endpoint should be protected and responds with

GET https://localhost:3000/twilio-jwt HTTP/1.1
Content-type: application/json;
Authorization: Bearer 


{ "twilioToken": "string" }

Virgil JWT Generation

To generate a Virgil JWT, you need to use the

class from the Virgil SDK.
const virgilCrypto = new VirgilCrypto();

const generator = new JwtGenerator({ appId: process.env.APP_ID, apiKeyId: process.env.API_KEY_ID, apiKey: virgilCrypto.importPrivateKey(process.env.API_PRIVATE_KEY), accessTokenSigner: new VirgilAccessTokenSigner(virgilCrypto) });

Then you need to provide an HTTP endpoint which will return the JWT with the user's identity as a JSON.

For more details take a look at the virgilToken.js file.


This library is released under the 3-clause BSD License.


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