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>
    <allimages gaicontinue="Action_figures_-_wave1_-_dark_horn_03.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="175" ns="6" title="File:Action figures - coffeeliger 01.png" />
      <page pageid="176" ns="6" title="File:Action figures - coffeeliger 02.png" />
      <page pageid="177" ns="6" title="File:Action figures - coffeeliger 03.png" />
      <page pageid="178" ns="6" title="File:Action figures - espressoliger 01.png" />
      <page pageid="179" ns="6" title="File:Action figures - wave1 - command wolf 01.png" />
      <page pageid="180" ns="6" title="File:Action figures - wave1 - command wolf 02.png" />
      <page pageid="181" ns="6" title="File:Action figures - wave1 - command wolf 03.png" />
      <page pageid="182" ns="6" title="File:Action figures - wave1 - command wolf 04.png" />
      <page pageid="183" ns="6" title="File:Action figures - wave1 - dark horn 01.png" />
      <page pageid="184" ns="6" title="File:Action figures - wave1 - dark horn 02.png" />
    </pages>
  </query>
</api>