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>
    <alllinks>
      <l ns="0" title="Channel Switch2" />
      <l ns="0" title="Create ServerQuery Login" />
      <l ns="0" title="Hoster API" />
      <l ns="0" title="Hoster API EN" />
      <l ns="0" title="Schiftzeichen Falsch Youtube" />
      <l ns="0" title="TS3MusicBot API" />
      <l ns="0" title="TS3MusicBot installieren" />
      <l ns="0" title="Welche Webinterfaces Laufen mit dem TS3Musicbot" />
    </alllinks>
  </query>
</api>