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="2013-10-25T13:41:26Z" comment="" contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">__NOTOC__ __NOTITLE__
[[Image:WP notification example.400x205.gif | frame | &lt;center&gt;Want quick access to alternative opinions?&lt;br/&gt;&#039;&#039;&#039;WikipediaPlus&#039;&#039;&#039; can scan [[Website Configuration|your favorite sites]] for you...&lt;/center&gt;]]
&lt;big&gt;&lt;big&gt;&lt;font color=&quot;navy&quot;&gt;Wouldn&#039;t it be simple if &#039;official sources&#039; never made mistakes and only published fair, unbiased representations of the truth...?&lt;br/&gt;
&#039;&#039;&#039;&#039;&#039;WikipediaPlus&#039;&#039;&#039; is a tool for those of us who know that life is not that simple.&#039;&#039;&lt;/font&gt;
&lt;center&gt;&lt;big&gt;&lt;font color=&quot;green&quot;&gt;Watch: [http://www.youtube.com/watch?v=a3Sq0vUxwrc Youtube Video at 28C3]&lt;/font&gt;&lt;/big&gt;&lt;/center&gt;&lt;/big&gt;&lt;/big&gt;
&lt;center&gt;{{install}}&lt;/center&gt;
&lt;big&gt;If you [[Using_WikipediaPlus | use Wikipedia, but also value other opinions]], WikipediaPlus is a browser extension that may help. It looks at the URL and title of the page you are browsing, and silently checks other websites you are interested in to see if they contain relevant information. If so, a notification bar appears with links to the matching pages, so alternative points of view are just a click away. As an increasingly professionalized media source, Wikipedia has a [https://wikispooks.com/wiki/Project:The_Problem_with_Wikipedia well-established bias]:&lt;/big&gt;
{{QB| &quot;To the extent that a particular topic is judged to challenge established power structures and their &quot;official narratives&quot;, the reliability and ultimate accuracy of Wikipedia articles touching on it will tend to be compromised by agents of those structures. At the extremes of power and perceived threat, Wikipedia&#039;s policy on &quot;reliable sources&quot; pretty much guarantees that the compromise will be fundamental.&quot;&lt;ref&gt;[https://wikispooks.com/wiki/WikiSpooks:The_Problem_with_Wikipedia The Core Problem With Wikipedia]&lt;/ref&gt;}}
&lt;br/&gt;
&lt;big&gt;If you are not happy with Wikipedia&#039;s definition of &#039;reliable source&lt;small&gt;$&lt;/small&gt;&#039;, then [[Website Configuration | choose your own &#039;reliable&#039; sources]] of information with which to supplement it.&lt;/big&gt;
&lt;br/&gt;
&lt;references/&gt;</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>