Right now, it's a tool that emails you if a new port opens up on your site. "Pingdom for open ports". I built it in response to a couple friends who got their sites hacked after deploying updates with mongodb or elasticsearch ports open.

The site is http://www.scriptcat.io (I submitted it to HN previously).

You know have a new user. Why does it say I have reached the max number of sites when I try to add a second?

Hey! Thank you! I limited the number of sites you can add by default to discourage malicious use -- I've updated your account so you can have 10. Let me know if you need more!