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>
    <recentchanges rccontinue="20220713100446|17840" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="海底新都市" pageid="81" revid="11684" old_revid="11683" rcid="17850" timestamp="2022-09-05T11:00:01Z" />
      <rc type="edit" ns="0" title="海底新都市" pageid="81" revid="11683" old_revid="11276" rcid="17849" timestamp="2022-09-05T10:58:22Z" />
      <rc type="log" ns="2" title="利用者:LaLa" pageid="0" revid="0" old_revid="0" rcid="17848" timestamp="2022-09-05T10:56:52Z" />
      <rc type="new" ns="0" title="宇宙 (究想)" pageid="8833" revid="11682" old_revid="0" rcid="17847" timestamp="2022-08-28T06:22:44Z" />
      <rc type="edit" ns="0" title="部門賞" pageid="8751" revid="11681" old_revid="11680" rcid="17846" timestamp="2022-08-28T06:13:39Z" />
      <rc type="edit" ns="0" title="部門賞" pageid="8751" revid="11680" old_revid="11091" rcid="17845" timestamp="2022-08-28T06:13:29Z" />
      <rc type="edit" ns="0" title="海底都市" pageid="83" revid="11679" old_revid="11580" rcid="17844" timestamp="2022-08-28T04:48:09Z" />
      <rc type="edit" ns="0" title="超巨大都市" pageid="8746" revid="11678" old_revid="11578" rcid="17843" timestamp="2022-08-28T04:45:42Z" />
      <rc type="edit" ns="0" title="海風船" pageid="1968" revid="11677" old_revid="11624" rcid="17842" timestamp="2022-07-13T18:14:03Z" />
      <rc type="edit" ns="0" title="飾り系船地形" pageid="8821" revid="11676" old_revid="11675" rcid="17841" timestamp="2022-07-13T16:58:06Z" />
    </recentchanges>
  </query>
</api>