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>
    <general mainpage="Main Page" base="http://coriolis-framework.de/wiki/index.php?title=Main_Page" sitename="Coriolis Framework Wiki" generator="MediaWiki 1.20.2" phpversion="5.6.40-70+0~20240421.84+debian11~1.gbp0c0ec4" phpsapi="cgi-fcgi" dbtype="mysql" dbversion="5.5.5-10.5.24-MariaDB-1:10.5.24+maria~deb11-log" case="first-letter" rights="Creative Commons „Namensnennung, Weitergabe unter gleichen Bedingungen“" lang="en" fallback8bitEncoding="windows-1252" readonly="" readonlyreason="This wiki is currently under attack and therefor is set to read only." writeapi="" timezone="Europe/Berlin" timeoffset="120" articlepath="/wiki/index.php?title=$1" scriptpath="/wiki" script="/wiki/index.php" variantarticlepath="" server="http://coriolis-framework.de" wikiid="c128_db1-CW" time="2024-04-30T21:01:07Z" maxuploadsize="104857600">
      <fallback />
    </general>
  </query>
</api>