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="BRL-CAD_Primitives|253" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main page" />
      <page pageid="94" ns="0" title="Developer Documents" />
      <page pageid="166" ns="1" title="Talk:Main page" />
      <page pageid="240" ns="0" title="MGED CMD cpi" />
      <page pageid="245" ns="0" title="MGED CMD db" />
      <page pageid="249" ns="0" title="MGED CMD debugbu" />
      <page pageid="251" ns="0" title="MGED CMD debuglib" />
      <page pageid="852" ns="0" title="Object-oriented interfaces" />
      <page pageid="1639" ns="0" title="Burst" />
    </pages>
  </query>
</api>