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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="20081009094144" timestamp="2008-10-09T09:41:44Z" ns="0" title="Templates:Lang" />
        <page value="20081013114014" timestamp="2008-10-13T11:40:14Z" ns="0" title="GNU Free Documentation License" />
        <page value="20081024075220" timestamp="2008-10-24T07:52:20Z" ns="0" title="David Smart" />
        <page value="20081025163524" timestamp="2008-10-25T16:35:24Z" ns="0" title="Widget:Blip.tv" />
        <page value="20081123185726" timestamp="2008-11-23T18:57:26Z" ns="0" title="Anthony Gatto with Dick Franco Video 1983" />
        <page value="20081205183610" timestamp="2008-12-05T18:36:10Z" ns="0" title="Zamoratte" />
        <page value="20081215080555" timestamp="2008-12-15T08:05:55Z" ns="0" title="Slide Show" />
        <page value="20090112235759" timestamp="2009-01-12T23:57:59Z" ns="0" title="Los Aregos" />
        <page value="20090118211553" timestamp="2009-01-18T21:15:53Z" ns="0" title="Mark David" />
        <page value="20090226054550" timestamp="2009-02-26T05:45:50Z" ns="0" title="Tunga" />
      </results>
    </querypage>
  </query>
</api>