Sounds like you already have an API for that no? That's how LE tools works I believe.
So it's just a matter of making the call from the client as far as getting the data, which should be fairly easy, unless that API is slow/expensive.
Making a UI to fill that data in sounds like a serious PITA though.
It's WAY more performant to ask the game server that you're connected to than to hit an external API.