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="Página principal" base="http://pt.musiclexis.com/index.php/P%C3%A1gina_principal" sitename="MusicLexis" logo="http://pt.musiclexis.com/resources/assets/portugues.png" generator="MediaWiki 1.24.1" phpversion="7.0.33" phpsapi="litespeed" dbtype="mysql" dbversion="10.6.15-MariaDB-cll-lve" imagewhitelistenabled="" langconversion="" titleconversion="" linkprefixcharset="" linkprefix="" linktrail="/^([áâãàéêẽçíòóôõq̃úüűũa-z]+)(.*)$/sDu" case="first-letter" lang="pt" fallback8bitEncoding="windows-1252" writeapi="" timezone="Europe/Athens" timeoffset="180" articlepath="/index.php/$1" scriptpath="" script="/index.php" server="http://pt.musiclexis.com" servername="pt.musiclexis.com" wikiid="musiclex_db6" time="2024-05-06T19:30:35Z" maxuploadsize="104857600" favicon="http://pt.musiclexis.com/favicon.ico">
      <fallback>
        <lang code="pt-br" />
        <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">Multimédia</ns>
      <ns id="-1" case="first-letter" canonical="Special" xml:space="preserve">Especial</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Discussão</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Utilizador</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Utilizador Discussão</ns>
      <ns id="4" case="first-letter" subpages="" canonical="Project" xml:space="preserve">MusicLexis</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">MusicLexis Discussão</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Ficheiro</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Ficheiro Discussão</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 Discussão</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Predefinição</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Predefinição Discussão</ns>
      <ns id="12" case="first-letter" subpages="" canonical="Help" xml:space="preserve">Ajuda</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Ajuda Discussão</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Categoria</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Categoria Discussão</ns>
    </namespaces>
    <namespacealiases>
      <ns id="2" xml:space="preserve">Usuário</ns>
      <ns id="2" xml:space="preserve">Utilizadora</ns>
      <ns id="3" xml:space="preserve">Usuário Discussão</ns>
      <ns id="3" xml:space="preserve">Utilizadora Discussão</ns>
      <ns id="6" xml:space="preserve">Arquivo</ns>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="6" xml:space="preserve">Imagem</ns>
      <ns id="7" xml:space="preserve">Arquivo Discussão</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="7" xml:space="preserve">Imagem Discussão</ns>
    </namespacealiases>
    <statistics pages="36" articles="1" views="74913" edits="104" images="2" users="11" activeusers="0" admins="1" jobs="0" />
  </query>
</api>