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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="WhiteWizard" comment="/* Test Content */" />
        </revisions>
      </page>
    </pages>
    <general mainpage="Tapestries MUCK" base="https://www.fur.com/tapestries/wiki/Tapestries_MUCK" sitename="Tapestries MUCK" generator="MediaWiki 1.16.2" phpversion="5.6.40-0+deb8u12" phpsapi="apache2handler" dbtype="mysql" dbversion="5.0.51a-24+lenny5" case="first-letter" rights="" lang="en" fallback8bitEncoding="windows-1252" writeapi="" timezone="UTC" timeoffset="0" articlepath="/tapestries/wiki/$1" scriptpath="/tapestries/wiki" script="/tapestries/wiki/index.php" variantarticlepath="" server="https://www.fur.com" wikiid="tap_wikidb" time="2024-05-09T11:01:11Z" />
  </query>
</api>