Board Thread:Script Suggestions/@comment-4551144-20150510180720/@comment-11733175-20150510212739

As mentioned above, the checkuser tool does this. There's a reason checkuser is restricted, it's not given out on wikis except in very unusual circumstances and a big history of vandalism. Even then it's restricted to a small number users as opposed to being given out to say every admin on a wiki.

The wikis a user has edited on can be looked up with another tool, but again it's restricted to staff, vstf and helpers. It requires looking up various things server side which can't be replicated in js (as does checkuser).