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>
    <allimages aicontinue="log_file_open.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="chkp_mgmt_ha_sync_error.png" timestamp="2013-05-21T06:41:01Z" url="http://www.cpwiki.net/images/f/fb/chkp_mgmt_ha_sync_error.png" descriptionurl="http://www.cpwiki.net/index.php/File:chkp_mgmt_ha_sync_error.png" ns="6" title="File:chkp mgmt ha sync error.png" />
      <img name="chkp_vrrp_cluster_config-1.png" timestamp="2013-09-15T08:21:20Z" url="http://www.cpwiki.net/images/0/05/chkp_vrrp_cluster_config-1.png" descriptionurl="http://www.cpwiki.net/index.php/File:chkp_vrrp_cluster_config-1.png" ns="6" title="File:chkp vrrp cluster config-1.png" />
      <img name="chkp_vrrp_rule.png" timestamp="2013-09-13T21:16:04Z" url="http://www.cpwiki.net/images/9/96/chkp_vrrp_rule.png" descriptionurl="http://www.cpwiki.net/index.php/File:chkp_vrrp_rule.png" ns="6" title="File:chkp vrrp rule.png" />
      <img name="cp_mgmt_api_enable_all_IPs.png" timestamp="2018-04-22T21:37:52Z" url="http://www.cpwiki.net/images/d/d4/cp_mgmt_api_enable_all_IPs.png" descriptionurl="http://www.cpwiki.net/index.php/File:cp_mgmt_api_enable_all_IPs.png" ns="6" title="File:cp mgmt api enable all IPs.png" />
      <img name="cpportsr77.png" timestamp="2018-03-16T15:14:06Z" url="http://www.cpwiki.net/images/d/de/cpportsr77.png" descriptionurl="http://www.cpwiki.net/index.php/File:cpportsr77.png" ns="6" title="File:cpportsr77.png" />
      <img name="gateway_view.png" timestamp="2018-04-24T17:21:24Z" url="http://www.cpwiki.net/images/1/18/gateway_view.png" descriptionurl="http://www.cpwiki.net/index.php/File:gateway_view.png" ns="6" title="File:gateway view.png" />
      <img name="global_assing.png" timestamp="2018-04-24T15:28:56Z" url="http://www.cpwiki.net/images/2/23/global_assing.png" descriptionurl="http://www.cpwiki.net/index.php/File:global_assing.png" ns="6" title="File:global assing.png" />
      <img name="install_AND_publish.png" timestamp="2018-05-03T21:09:12Z" url="http://www.cpwiki.net/images/3/3c/install_AND_publish.png" descriptionurl="http://www.cpwiki.net/index.php/File:install_AND_publish.png" ns="6" title="File:install AND publish.png" />
      <img name="install_select_package.png" timestamp="2018-05-03T21:11:40Z" url="http://www.cpwiki.net/images/2/2e/install_select_package.png" descriptionurl="http://www.cpwiki.net/index.php/File:install_select_package.png" ns="6" title="File:install select package.png" />
      <img name="install_status.png" timestamp="2018-05-03T21:31:21Z" url="http://www.cpwiki.net/images/c/c2/install_status.png" descriptionurl="http://www.cpwiki.net/index.php/File:install_status.png" ns="6" title="File:install status.png" />
    </allimages>
  </query>
</api>