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>
    <alllinks galcontinue="Cloud_Jumpstart|16297" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="10" ns="0" title="Designer documentation summary" />
      <page pageid="14" ns="0" title="Alien 9800" />
      <page pageid="16" ns="0" title="Symbol XR440" />
      <page pageid="352" ns="0" title="Edge Server HOWTOs" />
      <page pageid="457" ns="2" title="User:Maryclark007" />
      <page pageid="1131" ns="2" title="User:Rejnerath0120" />
      <page pageid="3103" ns="2" title="User:Anirakum" />
      <page pageid="16351" ns="0" title="Version 3.1" />
    </pages>
  </query>
</api>