Node.js

Testing the Backend

Start the server:

node server.js

Open a new terminal and use cURL to send a request to the /verification endpoint. The request must include the phone number in the body:

curl -X POST http://localhost:4000/verification \
  -H "Content-Type: application/json" \
  -d '{"phone":"+34600000000"}'

The request should return a 200 Ok response containing the request_id and the check_url. At this point we could use cURL again to send the check_url:

curl -L https://api-eu-4.vonage.com/v2/verify/aaa-bbb-cccc-dddd/silent-auth/redirect

The backend is now ready to be called from the mobile app. Next, we’ll build the Android client to complete the full 2FA flow.

Getting Started with Silent Authentication

Silent Authentication takes quite a bit to understand. This tutorial shows you how to build an integration from scratch with Nodejs and Kotlin

Available on:

Node.js

Steps

Introduction

Before you start

Initialize the Project

Create a Simple Express Server

Setting up Vonage credentials

Add the Vonage Verify API

Testing the Backend

Create New Android Project

Set up app Android dependencies

Set up import and constants

Create Mobile UI

Networking to Backend

Testing Full Flow