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>
    <allpages gapcontinue="Training_Schedule" />
  </query-continue>
  <query>
    <pages>
      <page pageid="658" ns="0" title="TODO List" contentmodel="wikitext" pagelanguage="en" touched="2017-09-13T02:05:38Z" lastrevid="2528" counter="2789" length="1228" />
      <page pageid="432" ns="0" title="Task 311 - Linear drill with spinning bit" contentmodel="wikitext" pagelanguage="en" touched="2015-12-17T19:18:41Z" lastrevid="1837" counter="24625" length="2877" />
      <page pageid="473" ns="0" title="Task 313 - Fracking" contentmodel="wikitext" pagelanguage="en" touched="2016-02-05T22:00:17Z" lastrevid="1865" counter="46075" length="2936" />
      <page pageid="697" ns="0" title="Topic Listing (Shop 101)" contentmodel="wikitext" pagelanguage="en" touched="2020-12-03T19:10:20Z" lastrevid="3014" counter="7430" length="2486" />
    </pages>
  </query>
</api>