You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="Russ hensel" comment="Undo revision 78754 by [[Special:Contributions/Russ hensel|Russ hensel]] ([[User talk:Russ hensel|talk]])" />
        </revisions>
      </page>
    </pages>
    <general mainpage="Main Page" base="http://www.opencircuits.com/Main_Page" sitename="OpenCircuits" generator="MediaWiki 1.19.2" phpversion="5.6.40" phpsapi="cgi-fcgi" dbtype="mysql" dbversion="5.7.25-log" case="first-letter" rights="Creative Commons Attribution Share Alike" lang="en" fallback8bitEncoding="windows-1252" writeapi="" timezone="America/Los_Angeles" timeoffset="-480" articlepath="/$1" scriptpath="" script="/index.php" variantarticlepath="" server="http://www.opencircuits.com" wikiid="opencircuits2-mw_" time="2019-11-17T05:28:49Z">
      <fallback />
    </general>
  </query>
</api>