ngrok is a handy tool that let’s you tunnel your local ports on your development machine to the public Internet. In that way it’s similar to Progrium’s localtunnel, except it comes with a cherry on top: request introspection
When you start up a tunnel with ngrok (e.g. ngrok 3000), it also gives you access to a sweet web interface which let’s you inspect requests made to the tunnel.
ngrok has binaries available for Windows, Linux, and OS X (I created a pull request to Homebrew to add a formula for ngrok, so installing it should be easier on OS X soon).
After you’ve checked out ngrok, you should have a look at my hobby project: Piranhas