You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <random>
      <page id="8902" ns="0" title="Buy Chantix online free, Cheap Chantix uk online, Can you take" />
      <page id="54212" ns="0" title="The Scientific Argument for Mastering One Thing at a Time 16430" />
    </random>
  </query>
</api>