You can use Yahoo’s YQL Engine to transform JSON to XML
https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20json%20where%20url%20%3D%20%27https%3A%2F%2Fapi.twitch.tv%2Fkraken%2Fstreams%3Fgame%3DLeague%2520of%2520Legends%27