djekl https://xboxapi.com Free
This is an UNOFFICIAL Xbox LIVE API. You can use this API to collect data about gamertags, such as profile/played games/game achievement data.
Please visit https://xboxapi.com for more information
xboxleaders https://www.xboxleaders.com/ Paid Usage
The XboxLeaders Xbox API allows you to read data for a gamertag on Xbox LIVE. It does not currently allow writing to Xbox LIVE, such as sending messages and managing friends' lists, but that is coming soon.