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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>
    <allpages>
      <p pageid="70" ns="0" title="Chicony LT5400" />
      <p pageid="67" ns="0" title="Commodore 1541" />
      <p pageid="78" ns="0" title="Commodore Amiga 1200" />
      <p pageid="79" ns="0" title="Commodore C64" />
      <p pageid="80" ns="0" title="Commodore VIC-20" />
      <p pageid="71" ns="0" title="IBM PS/2 Model 30" />
      <p pageid="81" ns="0" title="Macintosh LC475" />
      <p pageid="104" ns="0" title="Master 128 Turbo+" />
      <p pageid="82" ns="0" title="Robotron 1715M" />
      <p pageid="50" ns="0" title="Schneider EuroPC" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Sinclair Spectrum QL" />
  </query-continue>
</api>