You don’t know which Api’s google made available? Go check out the Google Api Playground, you can create apps in a browser window! Check the exmple below.

Happy coding.

/*
*  How to use the Feed Control to grab, parse and display feeds.
*/
google.load("feeds", "1"); function OnLoad() {
  // Create a feed control
  var feedControl = new google.feeds.FeedControl();

  // Add two feeds.
  feedControl.addFeed("http://dotinga.com/feed/", "Dotinga");
  feedControl.addFeed("http://kanikeralopklikken.nl/feed/", "Kanikeralopklikken");

  // Draw it.
  feedControl.draw(document.getElementById("content"));
}

google.setOnLoadCallback(OnLoad);

Now test it: