I made this tool for myself during a contest (i can't remember which one, maybe Back to the code). It was private because each time you use it the tool make 3 requests to the Codingame website. But G-Rom told me that it's not a problem at all.
Do you want any improvement or new feature ? Do like Neumann, code it yourself It's opensource: https://github.com/dreignier/cgstats
Just fork it and do a pull request.