This is a simple web app written in Node.js with Express. Additionally, I am using W3C Web Notifications API for the front-end UI to show the SMS receipt message with Socket.io.

$ npm install

Sign up at Nexmo to get your own API keys and a virtual number.

Create config.js in /server. The file should include the credentials.

module.exports = {
  api_key: 'f321a...',
  api_secret: '18e9aad...',
  number: '14155551234'
};

$ node server/index.js

Go to http://localhost:4000 and send text messages.