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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>
    <alllinks galcontinue="Zyxel_Keenetic_Lite_III_(rev.B)" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Geo microformat" missing="" />
      <page ns="0" title="Internal link" missing="" />
      <page ns="0" title="M:MediaWiki:Common.css" missing="" />
      <page ns="0" title="Module:Message box" missing="" />
      <page ns="0" title="Phabricator:43869" missing="" />
      <page pageid="181" ns="0" title="D-Link DIR-300 (версия C1E)" />
      <page pageid="116" ns="0" title="MAXnet CPE-W4n" />
      <page pageid="126" ns="0" title="MAXnet CPE-W4n настройка TV" />
      <page pageid="121" ns="0" title="MAXnet CPE-W4n обновление" />
      <page pageid="270" ns="0" title="SNR-CPE-W4N (rev.M)" />
    </pages>
  </query>
</api>