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="Black_Hexorium_Crystal|87" />
  </query-continue>
  <query>
    <pages>
      <page pageid="40" ns="0" title="Red Hexorium Crystal" />
      <page pageid="69" ns="10" title="Template:HEXCraft/content" />
      <page pageid="86" ns="0" title="Green Hexorium Crystal" />
      <page pageid="677" ns="0" title="Hexorium Manipulator" />
      <page pageid="1231" ns="0" title="Molecular Transposer" />
      <page pageid="1361" ns="0" title="Hexorium Probe" />
      <page pageid="1364" ns="0" title="Energy Node" />
      <page pageid="1529" ns="0" title="Mortar and Pestle" />
      <page pageid="1688" ns="0" title="Hexorium Saw" />
      <page pageid="1689" ns="0" title="Conversion Computer" />
    </pages>
  </query>
</api>