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>
    <links gplcontinue="1|0|Pillar_7" />
  </query-continue>
  <query>
    <pages>
      <page pageid="43" ns="0" title="Base Code" contentmodel="wikitext" pagelanguage="en" touched="2013-07-28T12:59:26Z" lastrevid="260" counter="9308" length="2002" />
      <page pageid="52" ns="0" title="Dimensions" contentmodel="wikitext" pagelanguage="en" touched="2014-10-15T12:13:43Z" lastrevid="314" counter="25376" length="775" />
      <page pageid="3" ns="0" title="Informational Plaque" contentmodel="wikitext" pagelanguage="en" touched="2013-05-07T12:58:55Z" lastrevid="192" counter="21056" length="1218" />
      <page pageid="2" ns="0" title="NKRYPT Tweet" contentmodel="wikitext" pagelanguage="en" touched="2014-10-11T00:49:36Z" lastrevid="295" counter="19727" length="763" />
      <page pageid="7" ns="0" title="Pillar 1" contentmodel="wikitext" pagelanguage="en" touched="2013-07-29T12:53:40Z" lastrevid="261" counter="48435" length="2319" />
      <page pageid="10" ns="0" title="Pillar 2" contentmodel="wikitext" pagelanguage="en" touched="2013-08-03T07:34:27Z" lastrevid="274" counter="64367" length="3470" />
      <page pageid="35" ns="0" title="Pillar 3" contentmodel="wikitext" pagelanguage="en" touched="2014-05-20T13:59:18Z" lastrevid="263" counter="39519" length="3304" />
      <page pageid="32" ns="0" title="Pillar 4" contentmodel="wikitext" pagelanguage="en" touched="2013-07-29T12:55:04Z" lastrevid="264" counter="38652" length="4311" />
      <page pageid="27" ns="0" title="Pillar 5" contentmodel="wikitext" pagelanguage="en" touched="2014-10-11T00:50:06Z" lastrevid="296" counter="32239" length="2348" />
      <page pageid="22" ns="0" title="Pillar 6" contentmodel="wikitext" pagelanguage="en" touched="2014-10-11T00:52:19Z" lastrevid="297" counter="70173" length="7094" />
    </pages>
  </query>
</api>