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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.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <allpages apcontinue="Image_Editing_FAQ" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="28" ns="0" title="Create 3-colour images" />
      <p pageid="27" ns="0" title="Digital development" />
      <p pageid="62" ns="0" title="Downloading Data from iTelescope" />
      <p pageid="73" ns="0" title="FAQ" />
      <p pageid="18" ns="0" title="FITS" />
      <p pageid="46" ns="0" title="Get Started with iTelescope" />
      <p pageid="72" ns="0" title="Help on Preparing Observing Project Proposal" />
      <p pageid="90" ns="0" title="How to Figure Out Which Objects are Visible to Which Telescopes" />
      <p pageid="38" ns="0" title="How to Take a One-Click Image using iTelescope" />
      <p pageid="39" ns="0" title="How to Take a Three-Colour Image using iTelescope" />
    </allpages>
  </query>
</api>