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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="20090715211037" timestamp="2009-07-15T21:10:37Z" ns="0" title="De:Hauptseite" />
        <page value="20091111115724" timestamp="2009-11-11T11:57:24Z" ns="0" title="Elfos mago" />
        <page value="20091111115738" timestamp="2009-11-11T11:57:38Z" ns="0" title="Enanos con Hacha de Doble Filo" />
        <page value="20091111115753" timestamp="2009-11-11T11:57:53Z" ns="0" title="Enanos que blanden el Hacha" />
        <page value="20091111115836" timestamp="2009-11-11T11:58:36Z" ns="0" title="Hadas de la Tormenta" />
        <page value="20091111115850" timestamp="2009-11-11T11:58:50Z" ns="0" title="Hadas del Fuego" />
        <page value="20091111115926" timestamp="2009-11-11T11:59:26Z" ns="0" title="Sacerdotes de la Guerra" />
        <page value="20091111115949" timestamp="2009-11-11T11:59:49Z" ns="0" title="Semigigantes Cantores" />
        <page value="20091111120003" timestamp="2009-11-11T12:00:03Z" ns="0" title="Tiradores de arco élfico" />
        <page value="20091125230313" timestamp="2009-11-25T23:03:13Z" ns="0" title="Raíz de Piedra" />
      </results>
    </querypage>
  </query>
</api>