Fraud Detection using Node and the Nexmo Verify and Number Insight APIs

This app used the Nexmo Number Insight and Verify APIs to demonstrate how to detect and prevent fraudulent phone numbers by comparing the IP of the request to the country of the number's current location.

Prerequisites

You will need:

• A free Nexmo account

Installation

git clone https://github.com/nexmo/node-verify-fraud-detection.git
cd node-verify-fraud-detection
npm install

Setup

Rename the config file:

mv .env.example .env

Fill in the values in .env as appropriate.

We have provided an IP environment variable so you can emulate a different location that the request comes from.

Running the App

npm start

The application should be available on http://localhost:5000.

Using the App

Register a number with the application in international format. For example for a UK number: 44555444333

If your IP is in the same country (or simulated to be) as your number, your number should be accepted directly. If it is not, it will be sent an SMS code to confirm that you indeed own this phone number.

To simulate a different location change the IP in the .env file to an IP in a different location and restart the server.

License

This product includes GeoLite2 data created by MaxMind, available from http://www.maxmind.com.