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>
    <allimages gaicontinue="OgreAion_MainUI_Settings.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7" ns="6" title="File:OgreAion Bot.png" />
      <page pageid="18" ns="6" title="File:OgreAion Console.png" />
      <page pageid="10" ns="6" title="File:OgreAion MCP.png" />
      <page pageid="25" ns="6" title="File:OgreAion MainUI Alias.png" />
      <page pageid="21" ns="6" title="File:OgreAion MainUI Auth.png" />
      <page pageid="14" ns="6" title="File:OgreAion MainUI AutoHunt.png" />
      <page pageid="13" ns="6" title="File:OgreAion MainUI Combat.png" />
      <page pageid="15" ns="6" title="File:OgreAion MainUI Console.png" />
      <page pageid="22" ns="6" title="File:OgreAion MainUI HUDs.png" />
      <page pageid="16" ns="6" title="File:OgreAion MainUI Popups.png" />
    </pages>
  </query>
</api>