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="20180815144126|3866" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="Hostek infrastructure" pageid="84" revid="3832" old_revid="3818" rcid="3876" timestamp="2019-06-17T22:51:53Z" />
      <rc type="edit" ns="0" title="Testing Your Web Site Before Changing DNS" pageid="318" revid="3831" old_revid="2982" rcid="3875" timestamp="2019-05-13T15:58:13Z" />
      <rc type="edit" ns="0" title="MySQL remote access" pageid="97" revid="3830" old_revid="3829" rcid="3874" timestamp="2019-04-22T21:27:12Z" />
      <rc type="edit" ns="0" title="MySQL remote access" pageid="97" revid="3829" old_revid="726" rcid="3873" timestamp="2019-04-22T21:26:20Z" />
      <rc type="edit" ns="0" title="CloudLinux" pageid="55" revid="3828" old_revid="2732" rcid="3872" timestamp="2019-04-09T19:21:34Z" />
      <rc type="edit" ns="0" title="PCI Compliance" pageid="82" revid="3827" old_revid="3826" rcid="3871" timestamp="2018-11-08T17:18:09Z" />
      <rc type="edit" ns="0" title="PCI Compliance" pageid="82" revid="3826" old_revid="3823" rcid="3870" timestamp="2018-11-08T17:17:34Z" />
      <rc type="log" ns="6" title="File:Pci-cert-uk.pdf" pageid="1297" revid="0" old_revid="0" rcid="3869" timestamp="2018-11-08T17:15:02Z" />
      <rc type="edit" ns="0" title="VPS Referral Programs" pageid="421" revid="3824" old_revid="1627" rcid="3868" timestamp="2018-10-18T19:09:08Z" />
      <rc type="edit" ns="0" title="PCI Compliance" pageid="82" revid="3823" old_revid="3805" rcid="3867" timestamp="2018-08-15T14:42:19Z" />
    </recentchanges>
  </query>
</api>