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-continue>
    <allpages apcontinue="Exchange_Hosted_2013_:_Créer_un_nouveau_compte" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="2" ns="0" title="Configurer la redirection DNS (Windows Serveur DNS)" />
      <p pageid="6" ns="0" title="Configurer la redirection de port (Windows Serveur DNS)" />
      <p pageid="12" ns="0" title="Créer un serveur openVPN avec ipFire" />
      <p pageid="11" ns="0" title="Deploiement d&#039;un routeur virtuel ipFire" />
      <p pageid="10" ns="0" title="Déploiement d&#039;un routeur virtuel ipFire" />
      <p pageid="21" ns="0" title="Déploiement d&#039;un serveur Exchange 2010" />
      <p pageid="22" ns="0" title="ESXi attribuer un disque dur physique à une VM" />
      <p pageid="55" ns="0" title="Every Thing You Need To Find Out About Coupon Codes" />
      <p pageid="61" ns="0" title="Every Thing You Needed To Have To Know Concerning Coupon Codes" />
      <p pageid="59" ns="0" title="Everything You Need To Understand About Coupon Codes" />
    </allpages>
  </query>
</api>