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="Vavada_бонус_за_регистрацию" />
  </query-continue>
  <query>
    <pages>
      <page pageid="636" ns="0" title="TOP Casino Online 2023" contentmodel="wikitext" pagelanguage="ru" touched="2023-04-14T10:03:25Z" lastrevid="690" counter="61" length="1605" new="" />
      <page pageid="71" ns="0" title="Vape products" contentmodel="wikitext" pagelanguage="ru" touched="2021-12-01T12:44:08Z" lastrevid="105" counter="80" length="2538" new="" />
      <page pageid="214" ns="0" title="Vavada casino bonus code 2022" contentmodel="wikitext" pagelanguage="ru" touched="2022-04-23T08:19:15Z" lastrevid="250" counter="88" length="2786" new="" />
      <page pageid="72" ns="0" title="Vavada casino официальный сайт" contentmodel="wikitext" pagelanguage="ru" touched="2021-12-03T08:54:26Z" lastrevid="106" counter="83" length="2835" new="" />
    </pages>
  </query>
</api>