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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="37" />
  </query-continue>
  <query>
    <pages>
      <page pageid="14" ns="0" title="Main Page">
        <revisions>
          <rev user="LGNilsson" timestamp="2014-03-28T07:36:03Z" comment="Protected &quot;[[Main Page]]&quot; ([Edit=Allow only administrators] (indefinite) [Move=Allow only administrators] (indefinite))" />
          <rev user="Danmurray" timestamp="2014-03-21T03:01:06Z" comment="This should be a working redirect" />
          <rev user="LGNilsson" timestamp="2014-03-20T15:44:45Z" comment="LGNilsson moved page [[Securifi Wiki Home]] to [[Main Page]]: revert" />
          <rev user="LGNilsson" timestamp="2014-03-20T15:44:23Z" comment="LGNilsson moved page [[Main Page]] to [[Securifi Wiki Home]] without leaving a redirect" />
          <rev user="LGNilsson" timestamp="2014-03-20T15:43:12Z" comment="Securifi Wiki Home" />
        </revisions>
      </page>
    </pages>
  </query>
</api>