Node.js

Backend Prerequisites

In this first part, you’ll build a small Node.js backend that starts and completes a Vonage Verify API flow.

This backend will support:

  • Silent Authentication: verification happens through the mobile network when possible (no code entry).
  • SMS verification: the user receives a one-time code by SMS and types it in. Verify will fall back to SMS if Silent Authentication is not available or fails.

Important: Your Vonage credentials (JWT/private key) must live only on the backend. The mobile app will call your backend, and your backend will call Vonage.

Before You Start

Make sure you have:

  • A Vonage account.
  • Nodejs (v.14+) and npm installed (node -v and npm -v to check).
  • We'll use cURL to test the backend.

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
1
Introduction
2
Backend Prerequisites
3
Set Up the Environment
4
Set Up Your Vonage Credentials
5
Add the Vonage Verify API to the Backend
6
Test the Backend
7
Mobile App Prerequisites
8
Set Up the Environment
9
Create a Basic Android Application
10
Connect with the Backend
11
Use the Vonage Client SDK
12
Set Up The Testing Environment
13
Test the Implementation