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>
    <pageswithprop gpwpcontinue="1309" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1279" ns="0" title="Main Page" contentmodel="wikitext" pagelanguage="en" touched="2023-12-24T18:37:01Z" lastrevid="4717" counter="277492" length="1773" />
      <page pageid="1284" ns="0" title="Kinase Group AGC" contentmodel="wikitext" pagelanguage="en" touched="2022-04-19T02:26:24Z" lastrevid="4536" counter="135832" length="3780" />
      <page pageid="1286" ns="0" title="Kinase Group TK" contentmodel="wikitext" pagelanguage="en" touched="2022-02-09T08:01:13Z" lastrevid="4463" counter="83339" length="4727" />
      <page pageid="1288" ns="0" title="Kinase Group TKL" contentmodel="wikitext" pagelanguage="en" touched="2015-08-16T01:41:48Z" lastrevid="3966" counter="70526" length="3199" />
      <page pageid="1291" ns="0" title="Kinase Group STE" contentmodel="wikitext" pagelanguage="en" touched="2022-02-09T05:37:25Z" lastrevid="4376" counter="37982" length="1220" />
      <page pageid="1293" ns="0" title="Kinase Group Other" contentmodel="wikitext" pagelanguage="en" touched="2022-05-09T01:37:00Z" lastrevid="4557" counter="119947" length="6041" />
      <page pageid="1298" ns="0" title="Kinase Family PLK" contentmodel="wikitext" pagelanguage="en" touched="2022-02-09T07:38:17Z" lastrevid="4441" counter="17144" length="1056" />
      <page pageid="1300" ns="0" title="Protein Kinase Evolution" contentmodel="wikitext" pagelanguage="en" touched="2021-10-30T21:58:21Z" lastrevid="4101" counter="35315" length="2517" />
      <page pageid="1301" ns="0" title="Kinase Group CAMK" contentmodel="wikitext" pagelanguage="en" touched="2022-02-09T07:33:41Z" lastrevid="4428" counter="46015" length="1982" />
      <page pageid="1302" ns="0" title="Kinase Group CK1" contentmodel="wikitext" pagelanguage="en" touched="2022-01-10T03:43:41Z" lastrevid="4224" counter="52280" length="1781" />
    </pages>
  </query>
</api>