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="2015-09-10T17:32:40Z|215" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="Cloudy plug-ins" rcid="225" pageid="76" revid="302" old_revid="278" timestamp="2015-12-03T17:23:23Z" />
      <rc type="edit" ns="0" title="Cloudy web UI" rcid="224" pageid="80" revid="301" old_revid="280" timestamp="2015-12-03T17:14:32Z" />
      <rc type="edit" ns="0" title="Zone" rcid="223" pageid="67" revid="300" old_revid="249" timestamp="2015-09-29T08:25:31Z" />
      <rc type="new" ns="0" title="Cloudy packages repository" rcid="222" pageid="90" revid="299" old_revid="0" timestamp="2015-09-15T16:44:15Z" />
      <rc type="new" ns="0" title="Cloudy Alix" rcid="221" pageid="89" revid="298" old_revid="0" timestamp="2015-09-11T02:32:29Z" />
      <rc type="new" ns="0" title="Cloudy Beaglebone" rcid="220" pageid="88" revid="297" old_revid="0" timestamp="2015-09-10T20:20:45Z" />
      <rc type="edit" ns="0" title="Cloudy Raspberry Pi" rcid="219" pageid="85" revid="296" old_revid="295" timestamp="2015-09-10T18:00:16Z" />
      <rc type="edit" ns="0" title="Cloudy Raspberry Pi" rcid="218" pageid="85" revid="295" old_revid="289" timestamp="2015-09-10T17:56:33Z" />
      <rc type="edit" ns="0" title="Cloudy in Debian" rcid="217" pageid="87" revid="294" old_revid="293" timestamp="2015-09-10T17:41:39Z" />
      <rc type="edit" ns="0" title="Cloudy in Debian" rcid="216" pageid="87" revid="293" old_revid="292" timestamp="2015-09-10T17:33:26Z" />
    </recentchanges>
  </query>
</api>