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="Call-home/Alert_Management|2671" />
  </query-continue>
  <query>
    <pages>
      <page pageid="8" ns="0" title="+ Getting Started Overview" />
      <page pageid="27" ns="0" title="+ Admin Guide Overview" />
      <page pageid="42" ns="0" title="+ Installation Guide Overview" />
      <page pageid="797" ns="0" title="Gladinet Setup" />
      <page pageid="2671" ns="0" title="Site Index" />
      <page pageid="2725" ns="0" title="QuantaStor CLI Users Guide" />
      <page pageid="2757" ns="0" title="Configure QuantaStor SAN/NAS Server" />
    </pages>
  </query>
</api>