Developers!
Well… What can i say? Having a good API around a framework its something hard to find… you wont find something easy and well documented here but you will find some usefull shit if you dig around a bit… Good luck in your dev journey around this undocumented tool!
WIki
Mutant Tools Api Documentation
May not be the best but is made with love!
Not sure how to use it? Just search for whatever you need. Let's say a rivet! If the method is in the rigging package you can use the mt.commands()
Good luck!
Open Wiki