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="Creative_Commons|363" />
  </query-continue>
  <query>
    <pages>
      <page pageid="64" ns="2" title="Benutzerin:Olivia" />
      <page pageid="92" ns="0" title="Highlights der Reise" />
      <page pageid="121" ns="0" title="Szczyty podróży" />
      <page pageid="282" ns="0" title="Polska grupa w Niemczech" />
      <page pageid="299" ns="0" title="Saskia" />
      <page pageid="319" ns="0" title="Bettina &amp; Krzysztof Highlights" />
      <page pageid="409" ns="10" title="Vorlage:Bild-by" />
      <page pageid="450" ns="0" title="Alte Wege - Neue Straßen" />
      <page pageid="510" ns="10" title="Vorlage:Uwl" />
      <page pageid="571" ns="10" title="Vorlage:Cat see also" />
    </pages>
  </query>
</api>