I don't believe that's the main use case for this project. The main use case for stuff like this is if you're using some external API like Zuora or Twilio that

I don't believe that's the main use case for this project. The main use case for stuff like this is if you're using some external API like Zuora or Twilio that needs to hit endpoints on your local test box. Something like this allows them to actually contact your machine indirectly. I've used ngrok before and it's a great solution for quick tests. I guess this is an open-sourced version of that.