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>
    <alltransclusions gatcontinue="Stub|21462" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4132" ns="10" title="Template:Box Note" />
      <page pageid="4133" ns="10" title="Template:TOCleft" />
      <page pageid="21365" ns="8" title="MediaWiki:Call Of Duty Mobile Cheats Unlimited CP Generator (Latest Ver)" />
      <page pageid="21462" ns="10" title="Template:Stub" />
      <page pageid="21489" ns="6" title="File:Dragon City Cheats Tool Gems Generator iOS Android (Current Generator).png" />
      <page pageid="21513" ns="6" title="File:New DealDash Bids Cheats Bids Generator 2026 Tested On Android Ios (Working).png" />
      <page pageid="21515" ns="6" title="File:UNO and Friends Cheats - Unlimited Coins Generator (New Codes Pack).png" />
      <page pageid="21813" ns="8" title="MediaWiki:Match Masters Cheats For Android And Ios:Open To The Public" />
      <page pageid="21885" ns="8" title="MediaWiki:Hay Day Cheats For Android And Ios:Usable Method" />
      <page pageid="21960" ns="8" title="MediaWiki:Gardenscapes Generator For Android And Ios:Huge" />
    </pages>
  </query>
</api>