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="2013-05-23T20:57:19Z" comment="/* API Documentation Main Page */" contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">==API Documentation Main Page==

{|  cellpadding=&quot;2&quot;
!width=&quot;250&quot; align=&quot;left&quot;|Getting Started
!width=&quot;300&quot; align=&quot;left&quot;|Domain Functions
!width=&quot;300&quot; align=&quot;left&quot;|SMS Functions
!width=&quot;300&quot; align=&quot;left&quot;|VoIP Functions
|- 
| [[PHP Integration Sample]] || [[Register]] || [[Send SMS]] || [[Get Line List]]
|-
| [[Changelog]] || [[Transfer]] || [[Get Credit Limit]] || [[Get Line Details]]
|-
|  || [[Renew]] || [[Get Sender Names]] || [[Get Calls History]]
|-
|  || [[Get Domain Info]] || [[Calculate Credits]] || [[List Available Phone Numbers]]
|-
|  || [[Modifying the Privacy Protection Status]] || [[Get History]]
|-
|  || [[Modifying the Protection Lock Status]] || [[List Scheduled SMS]]
|-
|  || [[Modifying the Auto-Renewal Status]] || [[Delete Sscheduled SMS]]
|-
|  || [[Update Contacts]] ||
|-
|  || [[Update Nameservers]] ||
|-
|}</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>