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="Benutzer:Mendoza/BOINC|816" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page" />
      <page pageid="37" ns="0" title="List of Pirate Parties" />
      <page pageid="325" ns="15" title="Category talk:Who&#039;s who" />
      <page pageid="450" ns="0" title="Global Pirate Party memberscount" />
      <page pageid="745" ns="0" title="Membership application" />
      <page pageid="20442" ns="2" title="User:Dichter/play" />
      <page pageid="21037" ns="0" title="PPI Minutes 2017 05 07" />
      <page pageid="21054" ns="0" title="PPI Minutes 2017 07 24" />
      <page pageid="21060" ns="0" title="PPI Minutes 2017 09 03" />
    </pages>
  </query>
</api>