You are looking at the HTML representation of the XML format.
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="20060404042546" timestamp="2006-04-04T04:25:46Z" ns="0" title="Compiling Metadata Consumer" />
        <page value="20060405222947" timestamp="2006-04-05T22:29:47Z" ns="0" title="Debian packages" />
        <page value="20060407190924" timestamp="2006-04-07T19:09:24Z" ns="0" title="WEL Hook" />
        <page value="20060411021254" timestamp="2006-04-11T02:12:54Z" ns="0" title="Eiffel Compilation Explained" />
        <page value="20060412070614" timestamp="2006-04-12T07:06:14Z" ns="0" title="Scintilla component" />
        <page value="20060412070627" timestamp="2006-04-12T07:06:27Z" ns="0" title="Gecko component" />
        <page value="20060413091905" timestamp="2006-04-13T09:19:05Z" ns="0" title="EiffelStudio Internals" />
        <page value="20060425083841" timestamp="2006-04-25T08:38:41Z" ns="0" title="ESWizard" />
        <page value="20060525211338" timestamp="2006-05-25T21:13:38Z" ns="0" title="MDC InformationTips" />
        <page value="20060603061323" timestamp="2006-06-03T06:13:23Z" ns="0" title="Internationalization/mo parser" />
      </results>
    </querypage>
  </query>
</api>