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="Portail:Wikhydro" base="http://wikhydro.developpement-durable.gouv.fr/index.php/Portail:Wikhydro" sitename="Wikhydro" generator="MediaWiki 1.20.0" phpversion="5.3.3" phpsapi="apache2handler" dbtype="postgres" dbversion="9.2.1" case="first-letter" rights="" lang="fr" fallback8bitEncoding="windows-1252" writeapi="" timezone="Europe/Berlin" timeoffset="120" articlepath="/index.php/$1" scriptpath="" script="/index.php" variantarticlepath="" server="http://wikhydro.developpement-durable.gouv.fr" wikiid="wiklimat" time="2025-07-20T08:48:57Z" maxuploadsize="104857600">
      <fallback>
        <lang code="en" />
      </fallback>
    </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" subpages="" 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" canonical="Project" xml:space="preserve">Wikhydro</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Discussion Wikhydro</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" 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="100" case="first-letter" canonical="Wiklimat" nonincludable="" xml:space="preserve">Wiklimat</ns>
      <ns id="101" case="first-letter" canonical="Wiklimat talk" nonincludable="" xml:space="preserve">Wiklimat talk</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>
      <ns id="170" case="first-letter" canonical="Filter" xml:space="preserve">Filter</ns>
      <ns id="171" case="first-letter" subpages="" canonical="Filter talk" xml:space="preserve">Filter talk</ns>
      <ns id="200" case="first-letter" canonical="Wikigeotech" nonincludable="" xml:space="preserve">Wikigeotech</ns>
      <ns id="201" case="first-letter" canonical="Wikigeotech talk" nonincludable="" xml:space="preserve">Wikigeotech talk</ns>
      <ns id="274" case="first-letter" canonical="Widget" xml:space="preserve">Widget</ns>
      <ns id="275" case="first-letter" subpages="" canonical="Widget talk" xml:space="preserve">Widget talk</ns>
      <ns id="300" case="first-letter" canonical="Wikibardig" nonincludable="" xml:space="preserve">Wikibardig</ns>
      <ns id="301" case="first-letter" canonical="Wikibardig talk" nonincludable="" xml:space="preserve">Wikibardig talk</ns>
      <ns id="900" case="first-letter" canonical="GR1" nonincludable="" xml:space="preserve">GR1</ns>
    </namespaces>
    <namespacealiases>
      <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>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="1" xml:space="preserve">Discuter</ns>
      <ns id="3" xml:space="preserve">Discussion Utilisateur</ns>
      <ns id="7" xml:space="preserve">Discussion Fichier</ns>
      <ns id="7" xml:space="preserve">Discussion Image</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>
    </namespacealiases>
    <statistics pages="11247" articles="2103" views="48566674" edits="60406" images="7253" users="235" activeusers="1" admins="22" jobs="1000" />
  </query>
</api>