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="Hlavní strana" base="https://wiki.spselitdobruska.cz/index.php/Hlavn%C3%AD_strana" sitename="Wiki SPŠel•it Dobruška" logo="https://wiki.spselitdobruska.cz/spselit_wiki.png" generator="MediaWiki 1.23.6" phpversion="7.4.9" phpsapi="apache2handler" dbtype="mysql" dbversion="5.5.5-10.1.26-MariaDB-0+deb9u1" imagewhitelistenabled="" langconversion="" titleconversion="" linkprefixcharset="" linkprefix="" linktrail="/^([a-záčďéěíňóřšťúůýž]+)(.*)$/sDu" case="first-letter" lang="cs" fallback8bitEncoding="cp1250" writeapi="" timezone="Europe/Berlin" timeoffset="120" articlepath="/index.php/$1" scriptpath="" script="/index.php" server="https://wiki.spselitdobruska.cz" wikiid="spselit_wiki" time="2024-05-18T21:39:51Z" maxuploadsize="104857600" favicon="https://wiki.spselitdobruska.cz/favicon.ico">
      <fallback>
        <lang code="en" />
      </fallback>
      <thumblimits>
        <limit>120</limit>
        <limit>150</limit>
        <limit>180</limit>
        <limit>200</limit>
        <limit>250</limit>
        <limit>300</limit>
      </thumblimits>
      <imagelimits>
        <limit width="320" height="240" />
        <limit width="640" height="480" />
        <limit width="800" height="600" />
        <limit width="1024" height="768" />
        <limit width="1280" height="1024" />
      </imagelimits>
    </general>
    <namespaces>
      <ns id="-2" case="first-letter" canonical="Media" xml:space="preserve">Média</ns>
      <ns id="-1" case="first-letter" canonical="Special" xml:space="preserve">Speciální</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Diskuse</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Uživatel</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Diskuse s uživatelem</ns>
      <ns id="4" case="first-letter" subpages="" canonical="Project" xml:space="preserve">Wiki SPŠel•it Dobruška</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Diskuse k Wiki SPŠel•it Dobruška</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Soubor</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Diskuse k souboru</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">Diskuse k MediaWiki</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Šablona</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Diskuse k šabloně</ns>
      <ns id="12" case="first-letter" subpages="" canonical="Help" xml:space="preserve">Nápověda</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Diskuse k nápovědě</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Kategorie</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Diskuse ke kategorii</ns>
      <ns id="500" case="first-letter" canonical="IT" xml:space="preserve">IT</ns>
    </namespaces>
    <namespacealiases>
      <ns id="2" xml:space="preserve">Uživatelka</ns>
      <ns id="3" xml:space="preserve">Diskuse s uživatelkou</ns>
      <ns id="3" xml:space="preserve">Uživatel diskuse</ns>
      <ns id="3" xml:space="preserve">Uživatelka diskuse</ns>
      <ns id="5" xml:space="preserve">Wiki SPŠel•it Dobruška diskuse</ns>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="7" xml:space="preserve">Soubor diskuse</ns>
      <ns id="9" xml:space="preserve">MediaWiki diskuse</ns>
      <ns id="11" xml:space="preserve">Šablona diskuse</ns>
      <ns id="13" xml:space="preserve">Nápověda diskuse</ns>
      <ns id="15" xml:space="preserve">Kategorie diskuse</ns>
    </namespacealiases>
    <statistics pages="27" articles="4" views="120587" edits="126" images="15" users="3" activeusers="0" admins="2" jobs="0" />
  </query>
</api>