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>
    <pages>
      <page ns="0" title="API" missing="" />
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="Admin" timestamp="2013-07-14T05:38:00Z" comment="" contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">Docs now up to date as of version 3.1 (July 14th, 2013). 

Installation
  
Xtra is very easy to install. One simple cut and paste command via SSH gets and installs the files for you. Xtra is accessible via any WHM theme from the Plugins Menu at the bottom Left of the WHM Menu area. 

Once installed you should then log into WHM and click on the Xtra Ultimate link. Enter the license key in the box and click the change button. Once the setup completes click the link to go to Xtra. That's it, you're all set to start using WHMXtra Ultimate Pro Suite. 
 
Note: Xtra is encoded with Ioncube so before using it you should ensure that the php loader under WHM's Tweak Settings section is set to Ioncube.
  
Removal
 
If you need to uninstall Xtra you can do so via SSH by simply logging in and typing the following commands:
 
wget http://whmxtra.com/pro/remitall.sh
sh remitall.sh
 
Caution: This will remove Xtra completely, including all custom links and settings.</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>