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>
    <revisions rvcontinue="1625" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="66.75.39.174" anon="" timestamp="2023-11-26T02:18:31Z" comment="maczfs is no longer active, but archived page is still available" />
          <rev user="Zfsfan" timestamp="2023-04-01T15:31:21Z" comment="" />
          <rev user="Zfsfan" timestamp="2023-04-01T15:30:52Z" comment="Quick link to instructions for bug reports" />
          <rev user="Zfsfan" timestamp="2023-03-27T13:59:28Z" comment="" />
          <rev user="Zfsfan" timestamp="2023-03-27T13:59:16Z" comment="Direct link to documentation (avoiding long searches)" />
        </revisions>
      </page>
    </pages>
  </query>
</api>