I need a Program Built (for use with mac ideally but can be windows too)

Basically what I would like is a fairly simple program built by an experienced programmer/software builder or whatever.

The program is going to be based around using a url which is https://www.xboxgamertag.com/

Xbox Gamertag is a website that allows me to search for available usernames by seeing if a profile exists with that specific username. Once a search is done on a name/username the next web page will either say username hasn't been taken yet or it will come up with a profile for that username.

I would like the program to be able to run one search at a time on a list of names (I only want it to run a search on each name in the list once. This will be done using a list of words/names I will make my self.

I would then ideally like the program to export all of the names that come up as hasn't been created yet (available) as a text/list file.