Gamertag is a bulk Xbox Live Gamertag availability checking utility.
An Xbox Live reservationId and authorization token are required. These can be acquired by sniffing network requests in the Xbox App for Windows 10.
Open credentials_example.json in your preferred text editor, input your reservationId and authorization token in the designated fields. Then rename credentials_example.json to credentials.json.
Create a text file named list.txt, place any desired gamertag on its own line.
python availability.py
available.txt- List of gamertags available for purchase