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="66" ns="0" title="Main Page">
        <revisions>
          <rev user="Sysop" timestamp="2022-09-01T19:01:36Z" comment="" contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">
{{box}}
&lt;br/&gt;
:This wiki site is dedicated to the creation of an [[ontodiktyology]] by [http://nse.pm NSE] within the project of standardizing the support for Global Communities, benefitting humanity, along with the RFC 6852 &quot;'''OpenStand'''&quot; principles and objectives&lt;ref&gt;[https://www.iab.org/appeals/2013-2/iab-response-to-the-appeal-regarding-rfc-6852-by-jfc-morfin/ an appeal by JFC Morfin having been taken into account] and a Private submission Draft being under preparation&lt;/ref&gt;...
&lt;br/&gt;
{{endbox}}
{{ref}}
&lt;br/&gt;

&lt;center&gt;&lt;small&gt;''The current logo is temporary - suggestions are welcome!''&lt;/small&gt;&lt;/center&gt;</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>