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-continue>
    <alllinks galcontinue="Chumby_Property_Dictionary|1285" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="1284" ns="0" title="Hacking hardware for chumby" />
      <page pageid="1289" ns="1" title="Talk:Hacking hardware for chumby" />
      <page pageid="1333" ns="0" title="Hacking hardware for Foo/Katamari" />
      <page pageid="1337" ns="0" title="Developing Widgets for Chumby: Sensor Access" />
      <page pageid="1372" ns="2" title="User:Wayn3w" />
      <page pageid="1382" ns="0" title="Now Playing Widget 2.0" />
      <page pageid="1414" ns="0" title="Chumby Tutorials" />
    </pages>
  </query>
</api>