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="Вход_в_личный_кабинет" />
  </query-continue>
  <query>
    <pages>
      <page pageid="239" ns="0" title="Zyxel Keenetic Lite III (rev.B)" contentmodel="wikitext" pagelanguage="ru" touched="2021-05-29T14:59:48Z" lastrevid="772" counter="19990" length="15999" />
      <page pageid="99" ns="0" title="Zyxel Keenetic Start" contentmodel="wikitext" pagelanguage="ru" touched="2015-01-21T17:03:23Z" lastrevid="266" counter="27313" length="8022" />
      <page pageid="104" ns="0" title="Zyxel Keenetic Start часть2" contentmodel="wikitext" pagelanguage="ru" touched="2015-01-21T18:15:40Z" lastrevid="273" counter="43115" length="6699" />
      <page pageid="82" ns="0" title="Виды роутеров по отношению к TV" contentmodel="wikitext" pagelanguage="ru" touched="2015-02-07T17:16:18Z" lastrevid="360" counter="48065" length="3878" />
    </pages>
  </query>
</api>