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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>
    <pages>
      <page pageid="127" ns="0" title="Main Page">
        <templates>
          <tl ns="10" title="Шаблон:!" />
          <tl ns="10" title="Шаблон:*mp" />
          <tl ns="10" title="Шаблон:-" />
          <tl ns="10" title="Шаблон:Did you know" />
          <tl ns="10" title="Шаблон:In the news" />
          <tl ns="10" title="Шаблон:Main Page banner" />
          <tl ns="10" title="Шаблон:POTD protected/default" />
        </templates>
      </page>
    </pages>
  </query>
</api>