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>
    <searchinfo totalhits="10" />
    <pages>
      <page pageid="5396" ns="0" title="PXV:CoClasses" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T10:11:15Z" lastrevid="50891" counter="34968" length="5184" />
      <page pageid="203" ns="0" title="PXV:ICabNode Clear" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T07:51:05Z" lastrevid="33653" counter="2975" length="786" />
      <page pageid="558" ns="0" title="PXV:IIXC Page Rop3" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T09:52:12Z" lastrevid="44559" counter="6397" length="5324" />
      <page pageid="2083" ns="0" title="PXV:IPXV Inst CreateOpenDocParams" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T10:12:34Z" lastrevid="49987" counter="12714" length="5848" />
      <page pageid="2864" ns="0" title="PXV:IUIX CmdMenu" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T10:11:04Z" lastrevid="50976" counter="10065" length="3656" />
      <page pageid="4149" ns="0" title="PXV:PXC BoxType" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T09:35:34Z" lastrevid="38071" counter="6555" length="3040" />
      <page pageid="5651" ns="0" title="PXV:PXC SubmitFormActionFlags" contentmodel="wikitext" pagelanguage="en" touched="2016-03-15T11:14:30Z" lastrevid="49051" counter="3562" length="1628" />
      <page pageid="4509" ns="0" title="PXV:PXC WatermarkFlags" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T07:47:03Z" lastrevid="38188" counter="4726" length="1467" />
      <page pageid="6263" ns="0" title="PXV:e document deactivated" contentmodel="wikitext" pagelanguage="en" touched="2017-04-05T14:23:17Z" lastrevid="50751" counter="2058" length="734" />
      <page pageid="5253" ns="0" title="PXV:op document cropPages Options" contentmodel="wikitext" pagelanguage="en" touched="2024-05-16T09:57:55Z" lastrevid="52396" counter="2639" length="3345" />
    </pages>
  </query>
</api>