A great way to expose your localhost to the web is through Ngrok. Ngrok allows your localhost web server to serve and receive requests across the Internet, and is the perfect tool to develop your app locally before pushing to a production server.

For example, if you’re developing your application in a Rails environment, the standard local port used is 3000.

To set up Ngrok to serve on that port, simply run ./ngrok http 3000 in your terminal.

https://ngrok.com//p>

That gives you a URL that you can submit to our required URLs which will allow us to POST requests to your application.