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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="1024" ns="0" title="Cache Chunks" />
      <p pageid="1025" ns="0" title="Chunk" />
      <p pageid="981" ns="0" title="Current events" />
      <p pageid="952" ns="0" title="Dialogs" />
      <p pageid="1010" ns="0" title="Downloading Files" />
      <p pageid="1009" ns="0" title="Downloading Headers" />
      <p pageid="1013" ns="0" title="Downloading Newsgroups" />
      <p pageid="954" ns="0" title="Dutch Help" />
      <p pageid="1011" ns="0" title="Glossary" />
      <p pageid="940" ns="0" title="Groups Tab" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="ISP Limitations" />
  </query-continue>
</api>