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>
    <pages>
      <page pageid="1621" ns="0" title="Off Site Forum" contentmodel="wikitext" pagelanguage="en" touched="2008-02-15T16:38:34Z" lastrevid="2091" counter="1105" length="336" new="" />
      <page pageid="2022" ns="0" title="OMGBANNINGZ" contentmodel="wikitext" pagelanguage="en" touched="2008-02-17T11:15:22Z" lastrevid="4339" counter="1129" length="781" new="" />
      <page pageid="2055" ns="0" title="Forever" contentmodel="wikitext" pagelanguage="en" touched="2008-03-17T20:24:17Z" lastrevid="4588" counter="1438" length="430" new="" />
      <page pageid="2172" ns="0" title="Aerin Ilium" contentmodel="wikitext" pagelanguage="en" touched="2015-10-24T08:58:26Z" lastrevid="5149" counter="2071" length="50" />
      <page pageid="2415" ns="0" title="Gaean" contentmodel="wikitext" pagelanguage="en" touched="2011-05-24T00:22:04Z" lastrevid="5896" counter="1656" length="166" />
      <page pageid="2517" ns="4" title="Taijitu:Current events" contentmodel="wikitext" pagelanguage="en" touched="2013-06-25T22:45:48Z" lastrevid="6390" counter="2005" length="30" new="" />
      <page pageid="2707" ns="0" title="United Defenders League" contentmodel="wikitext" pagelanguage="en" touched="2012-02-01T23:01:26Z" lastrevid="7584" counter="1284" length="269" />
      <page pageid="3132" ns="0" title="The North Pacific Regional Assembly" contentmodel="wikitext" pagelanguage="en" touched="2013-12-04T05:48:02Z" lastrevid="8549" counter="1045" length="449" new="" />
      <page pageid="3135" ns="0" title="The North Pacific" contentmodel="wikitext" pagelanguage="en" touched="2013-12-05T21:00:13Z" lastrevid="8560" counter="1873" length="1480" />
    </pages>
  </query>
</api>