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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="3822" ns="0" title="Baal Shem Tov" />
      <p pageid="1256" ns="0" title="Babalu Aye" />
      <p pageid="3929" ns="0" title="Bacchus" />
      <p pageid="3515" ns="0" title="Baghavad Gita" />
      <p pageid="4143" ns="0" title="Baha&#039; al-Din Naqshband" />
      <p pageid="4009" ns="0" title="Baldr" />
      <p pageid="3516" ns="0" title="Bardo Thodol" />
      <p pageid="2275" ns="0" title="Baron La Kwa" />
      <p pageid="2186" ns="0" title="Baron Samedi" />
      <p pageid="4173" ns="0" title="Bastet" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Beltane" />
  </query-continue>
</api>