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="Accueil" base="http://wiki.battle-arenas.net/index.php/Accueil" sitename="Aide Battle Arenas" logo="http://wiki.battle-arenas.net/skins/common/images/Logo.png" generator="MediaWiki 1.24.2" phpversion="5.6.30-0+deb8u1" phpsapi="apache2handler" dbtype="mysql" dbversion="5.5.5-10.0.32-MariaDB-0+deb8u1" imagewhitelistenabled="" langconversion="" titleconversion="" linkprefixcharset="" linkprefix="" linktrail="/^([a-zàâçéèêîôûäëïöüùÇÉÂÊÎÔÛÄËÏÖÜÀÈÙ]+)(.*)$/sDu" case="first-letter" lang="fr" fallback8bitEncoding="windows-1252" writeapi="" timezone="Europe/Berlin" timeoffset="120" articlepath="/index.php/$1" scriptpath="" script="/index.php" server="http://wiki.battle-arenas.net" servername="wiki.battle-arenas.net" wikiid="wikidb_v2" time="2024-04-27T07:44:49Z" maxuploadsize="104857600" favicon="http://wiki.battle-arenas.net/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">Spécial</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Discussion</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Utilisateur</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Discussion utilisateur</ns>
      <ns id="4" case="first-letter" subpages="" canonical="Project" xml:space="preserve">Aide Battle Arenas</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Discussion Aide Battle Arenas</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Fichier</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Discussion fichier</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">Discussion MediaWiki</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Modèle</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Discussion modèle</ns>
      <ns id="12" case="first-letter" subpages="" canonical="Help" xml:space="preserve">Aide</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Discussion aide</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Catégorie</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Discussion catégorie</ns>
      <ns id="102" case="first-letter" canonical="Attribut" xml:space="preserve">Attribut</ns>
      <ns id="103" case="first-letter" subpages="" canonical="Discussion attribut" xml:space="preserve">Discussion attribut</ns>
      <ns id="106" case="first-letter" canonical="Form" xml:space="preserve">Formulaire</ns>
      <ns id="107" case="first-letter" subpages="" canonical="Form talk" xml:space="preserve">Discussion formulaire</ns>
      <ns id="108" case="first-letter" canonical="Concept" xml:space="preserve">Concept</ns>
      <ns id="109" case="first-letter" canonical="Discussion concept" xml:space="preserve">Discussion concept</ns>
    </namespaces>
    <namespacealiases>
      <ns id="1" xml:space="preserve">Discuter</ns>
      <ns id="2" xml:space="preserve">Utilisatrice</ns>
      <ns id="3" xml:space="preserve">Discussion Utilisateur</ns>
      <ns id="3" xml:space="preserve">Discussion utilisatrice</ns>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Discussion Fichier</ns>
      <ns id="7" xml:space="preserve">Discussion Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="11" xml:space="preserve">Discussion Modèle</ns>
      <ns id="13" xml:space="preserve">Discussion Aide</ns>
      <ns id="15" xml:space="preserve">Discussion Catégorie</ns>
      <ns id="102" xml:space="preserve">Property</ns>
      <ns id="103" xml:space="preserve">Property talk</ns>
      <ns id="109" xml:space="preserve">Concept talk</ns>
    </namespacealiases>
    <statistics pages="818" articles="277" views="6641405" edits="4569" images="136" users="98" activeusers="0" admins="5" jobs="0" />
  </query>
</api>