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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="20111227153148" timestamp="2011-12-27T15:31:48Z" ns="0" title="What is the API?" />
        <page value="20120625101907" timestamp="2012-06-25T10:19:07Z" ns="0" title="PHP Integration Sample" />
        <page value="20120626131256" timestamp="2012-06-26T13:12:56Z" ns="0" title="Changelog" />
        <page value="20121026125348" timestamp="2012-10-26T12:53:48Z" ns="0" title="Register" />
        <page value="20121026125423" timestamp="2012-10-26T12:54:23Z" ns="0" title="Transfer" />
        <page value="20121026125453" timestamp="2012-10-26T12:54:53Z" ns="0" title="Renew" />
        <page value="20121026125509" timestamp="2012-10-26T12:55:09Z" ns="0" title="Get Domain Info" />
        <page value="20121026125538" timestamp="2012-10-26T12:55:38Z" ns="0" title="Modifying the Privacy Protection Status" />
        <page value="20121026125556" timestamp="2012-10-26T12:55:56Z" ns="0" title="Modifying the Protection Lock Status" />
        <page value="20121026125614" timestamp="2012-10-26T12:56:14Z" ns="0" title="Modifying the Auto-Renewal Status" />
      </results>
    </querypage>
  </query>
</api>