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>
    <allpages apcontinue="Fixing_Connection_Settings" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="15" ns="0" title="Canada" />
      <p pageid="110" ns="0" title="Clearing Browser Cache" />
      <p pageid="5" ns="0" title="Configuring Your Router" />
      <p pageid="21" ns="0" title="Connecting Firefox with FoxyProxy" />
      <p pageid="3" ns="0" title="Current Help Nav" />
      <p pageid="42" ns="0" title="DNS Migration Troubleshooting" />
      <p pageid="146" ns="0" title="Difference between Proxy and VPN" />
      <p pageid="152" ns="0" title="Error 619: How to fix" />
      <p pageid="118" ns="0" title="FAQ" />
      <p pageid="31" ns="0" title="FAQ/ProxyService" />
    </allpages>
  </query>
</api>