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>
    <pages>
      <page pageid="5" ns="0" title="Réservée" contentmodel="wikitext" pagelanguage="fr" touched="2016-07-24T02:45:16Z" lastrevid="318" counter="22958" length="2080" />
      <page pageid="87" ns="0" title="Implications Philosophiques,Intelligences et organismes artificiels" contentmodel="wikitext" pagelanguage="fr" touched="2018-03-30T22:54:43Z" lastrevid="534" counter="1789" length="5420" />
      <page pageid="92" ns="0" title="HHDH" contentmodel="wikitext" pagelanguage="fr" touched="2018-08-18T21:29:46Z" lastrevid="573" counter="6728" length="43661" />
      <page pageid="112" ns="0" title="“Agiliser, ce n’est pas une méthode informatique, mais une méthode de management et d’émancipation&quot; Henri Verdier" contentmodel="wikitext" pagelanguage="fr" touched="2018-11-27T14:18:30Z" lastrevid="665" counter="1384" length="23213" new="" />
      <page pageid="155" ns="0" title="Glossaire" contentmodel="wikitext" pagelanguage="fr" touched="2020-01-23T19:20:12Z" lastrevid="1067" counter="16329" length="121084" />
      <page pageid="162" ns="0" title="Signalements" contentmodel="wikitext" pagelanguage="fr" touched="2019-07-16T07:33:02Z" lastrevid="998" counter="5276" length="9839" />
    </pages>
  </query>
</api>