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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="15886" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="A1067065" timestamp="2021-10-27T03:31:28Z" comment="/* 2021 */ updated Ingenuity 2021 prizes" />
          <rev user="A1067065" timestamp="2021-10-27T03:27:12Z" comment="/* 2021 */ added Ingenuity 2021" />
          <rev user="A1067065" timestamp="2021-08-10T04:08:44Z" comment="/* Honours Projects (mid-year) */ corrected 2021s2 names" />
          <rev user="A1067065" timestamp="2021-08-09T15:37:53Z" comment="/* Projects */ added 2021s2 projects" />
          <rev user="A1067065" timestamp="2021-04-13T09:09:48Z" comment="/* Honours Projects */ removed 2021s1-13331" />
        </revisions>
      </page>
    </pages>
  </query>
</api>