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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="44208" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Main Page">
        <revisions>
          <rev user="Clotho" timestamp="2017-02-22T02:05:53Z" comment="link to updated ToS version" />
          <rev user="Clotho" timestamp="2014-06-06T15:58:38Z" comment="updating links" />
          <rev user="Equinox" timestamp="2013-08-02T01:48:42Z" comment="Pop usables in there too" />
          <rev user="Equinox" timestamp="2013-08-02T01:45:46Z" comment="Add battle sprites" />
          <rev user="Equinox" timestamp="2012-03-09T23:43:28Z" comment="o hai missions!" />
        </revisions>
      </page>
    </pages>
  </query>
</api>