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>
    <general mainpage="Pagrindinis puslapis" base="https://www.kaisiadoriumuziejus.lt/enciklopedija/index.php?title=Pagrindinis_puslapis" sitename="Kaišiadorių enciklopedija" generator="MediaWiki 1.18.6" phpversion="5.4.45" phpsapi="cgi-fcgi" dbtype="mysql" dbversion="5.6.5-10.0.24-MariaDB" case="first-letter" rights="" lang="lt" fallback8bitEncoding="windows-1257" writeapi="" timezone="Europe/Vilnius" timeoffset="180" articlepath="/enciklopedija/index.php?title=$1" scriptpath="/enciklopedija" script="/enciklopedija/index.php" variantarticlepath="" server="https://www.kaisiadoriumuziejus.lt" wikiid="kaisiado_wp-wiki_" time="2023-06-04T18:24:16Z" />
    <namespaces>
      <ns id="-2" case="first-letter" canonical="Media" xml:space="preserve">Medija</ns>
      <ns id="-1" case="first-letter" canonical="Special" xml:space="preserve">Specialus</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Aptarimas</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Naudotojas</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Naudotojo aptarimas</ns>
      <ns id="4" case="first-letter" canonical="Project" xml:space="preserve">Kaisiadoriu enciklopedija</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Kaisiadoriu enciklopedija aptarimas</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Vaizdas</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Vaizdo aptarimas</ns>
      <ns id="8" case="first-letter" subpages="" canonical="MediaWiki" xml:space="preserve">MediaWiki</ns>
      <ns id="9" case="first-letter" subpages="" canonical="MediaWiki talk" xml:space="preserve">MediaWiki aptarimas</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Šablonas</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Šablono aptarimas</ns>
      <ns id="12" case="first-letter" canonical="Help" xml:space="preserve">Pagalba</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Pagalbos aptarimas</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Kategorija</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Kategorijos aptarimas</ns>
    </namespaces>
    <namespacealiases>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
    </namespacealiases>
    <statistics pages="4645" articles="2004" views="11740024" edits="18126" images="2368" users="658" activeusers="0" admins="4" jobs="0" />
  </query>
</api>