Here's a PHP file that does what you want as far as the "level details for a specific level" part is concerned. I ripped it from Jazz2Online's source code and it's eight years old so it may have some ideosyncracies and leftover functionality you don't need, but it works and you should be able to adapt it for your needs, or port it to a language you're comfortable with.

https://gist.github.com/stijnstijn/d...5e9ed29d68ceb1

EDIT: Oh, you mean for J2O? No, there's no such thing, but it's not a bad idea. I might add something like that at some point.