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HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaifrom="Al3 strecken en.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="137" ns="6" title="File:2009.06.21 browser.png" />
      <page pageid="138" ns="6" title="File:2009.06.21 testrunner.png" />
      <page pageid="148" ns="6" title="File:2009.10.11 commitdiff.png" />
      <page pageid="162" ns="6" title="File:2010.01.31 gitsharp.demo.png" />
      <page pageid="311" ns="6" title="File:300px-MUTC.png" />
      <page pageid="318" ns="6" title="File:Aeroports de Paris Orly logo.svg" />
      <page pageid="309" ns="6" title="File:Airport Bremen Logo.png" />
      <page pageid="336" ns="6" title="File:Al3 daisy chain.png" />
      <page pageid="362" ns="6" title="File:Al3 daisy chain en.png" />
      <page pageid="337" ns="6" title="File:Al3 strecken.png" />
    </pages>
  </query>
</api>