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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-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20130823153851" timestamp="2013-08-23T15:38:51Z" ns="0" title="Distant Thunder: Chapter 4" />
        <page value="20130823153851" timestamp="2013-08-23T15:38:51Z" ns="0" title="Anshin Province" />
        <page value="20130823153851" timestamp="2013-08-23T15:38:51Z" ns="0" title="Distant Thunder: Chapter 1" />
        <page value="20130823153851" timestamp="2013-08-23T15:38:51Z" ns="0" title="Epiphany" />
        <page value="20130823153851" timestamp="2013-08-23T15:38:51Z" ns="0" title="Distant Thunder: Chapter 7" />
        <page value="20130823153852" timestamp="2013-08-23T15:38:52Z" ns="0" title="Hida Jotaka" />
        <page value="20130823153852" timestamp="2013-08-23T15:38:52Z" ns="0" title="Ide Ken&#039;Ichi" />
        <page value="20130823153853" timestamp="2013-08-23T15:38:53Z" ns="0" title="Kakita Ibara" />
        <page value="20130823153853" timestamp="2013-08-23T15:38:53Z" ns="0" title="Kakita Rei" />
        <page value="20130823153904" timestamp="2013-08-23T15:39:04Z" ns="0" title="Shosuro Himitsu" />
      </results>
    </querypage>
  </query>
</api>