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|HAARP" />
  </query-continue>
  <query>
    <pages>
      <page pageid="7" ns="0" title="Frequenties omgeving Leiden" contentmodel="wikitext" pagelanguage="en" touched="2013-11-04T11:05:48Z" lastrevid="133" counter="5556" length="187" />
      <page pageid="93" ns="0" title="Electronics shops" contentmodel="wikitext" pagelanguage="en" touched="2016-06-08T16:37:42Z" lastrevid="953" counter="8531" length="806" />
      <page pageid="72" ns="0" title="ARS-USB and Yeasu G4500" contentmodel="wikitext" pagelanguage="en" touched="2015-04-18T12:22:47Z" lastrevid="729" counter="3411" length="161" />
      <page pageid="60" ns="0" title="Famous Hams" contentmodel="wikitext" pagelanguage="en" touched="2015-08-17T10:35:47Z" lastrevid="874" counter="5093" length="1124" />
      <page pageid="77" ns="0" title="Broadcast radio" contentmodel="wikitext" pagelanguage="en" touched="2015-07-04T19:22:28Z" lastrevid="756" counter="3436" length="116" />
      <page pageid="61" ns="0" title="Distributed RF Scanner Array" contentmodel="wikitext" pagelanguage="en" touched="2014-11-03T10:55:41Z" lastrevid="580" counter="4690" length="277" />
      <page pageid="62" ns="0" title="Cognitive Radio" contentmodel="wikitext" pagelanguage="en" touched="2014-11-03T10:44:04Z" lastrevid="572" counter="3415" length="138" new="" />
      <page pageid="86" ns="0" title="Digital Voice Radio" contentmodel="wikitext" pagelanguage="en" touched="2016-03-11T10:06:14Z" lastrevid="939" counter="3562" length="627" />
      <page pageid="35" ns="0" title="DATV" contentmodel="wikitext" pagelanguage="en" touched="2014-05-09T08:27:05Z" lastrevid="451" counter="5267" length="413" />
      <page pageid="109" ns="0" title="GnuRadio for Adalm-Pluto Ubuntu Bionic 18.04" contentmodel="wikitext" pagelanguage="en" touched="2018-10-27T16:26:25Z" lastrevid="1147" counter="4449" length="376" />
    </pages>
  </query>
</api>