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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>
    <querypage name="Ancientpages">
      <results>
        <page value="20130516082023" timestamp="2013-05-16T08:20:23Z" ns="0" title="Démarrer avec médiaWiki" />
        <page value="20131114211037" timestamp="2013-11-14T21:10:37Z" ns="0" title="Jugon-les-Lacs" />
        <page value="20131114211140" timestamp="2013-11-14T21:11:40Z" ns="0" title="Joseph Marie CRENAN (1892-1917)" />
        <page value="20131114211236" timestamp="2013-11-14T21:12:36Z" ns="0" title="Grâces" />
        <page value="20131114211414" timestamp="2013-11-14T21:14:14Z" ns="0" title="Vincent Jean Marie DANIC (1889-1915)" />
        <page value="20131204173805" timestamp="2013-12-04T17:38:05Z" ns="0" title="Saint-Jouan-de-l&#039;Isle" />
        <page value="20131207172323" timestamp="2013-12-07T17:23:23Z" ns="0" title="2e régiment de marins" />
        <page value="20131208175912" timestamp="2013-12-08T17:59:12Z" ns="0" title="5e escadrille de patrouille" />
        <page value="20131223111216" timestamp="2013-12-23T11:12:16Z" ns="0" title="Berhet" />
        <page value="20131223111336" timestamp="2013-12-23T11:13:36Z" ns="0" title="Bréhand" />
      </results>
    </querypage>
  </query>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
</api>