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HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <revisions rvcontinue="28477" />
  </query-continue>
  <query>
    <pages>
      <page pageid="5" ns="0" title="Main Page">
        <revisions>
          <rev user="GonoszTopi" timestamp="2016-04-07T16:16:28Z" comment="/* aMule Wiki and forum */ Fix link to edithelppage" />
          <rev user="GonoszTopi" timestamp="2014-08-27T09:27:46Z" comment="Rolled back too much..." />
          <rev user="GonoszTopi" timestamp="2014-08-27T09:24:55Z" comment="Reverted edits by [[Special:Contributions/GonoszTopi|GonoszTopi]] ([[User talk:GonoszTopi|talk]]) to last revision by [[User:Kry|Kry]]" />
          <rev user="GonoszTopi" timestamp="2014-08-20T19:37:40Z" comment="Remove warning about account creation being disabled" />
          <rev user="GonoszTopi" timestamp="2013-02-04T13:46:40Z" comment="Fixed the link to edit help page" />
        </revisions>
      </page>
    </pages>
  </query>
</api>