You are looking at the HTML representation of the XML format.
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>
    <allpages gapcontinue="TIPS_AND_TRICKS_TO_PLAY_INDIAN_MATKA_GAME2101179" />
  </query-continue>
  <query>
    <pages>
      <page pageid="50577" ns="0" title="THE BEST SEX POSITIONS TO CONCEIVE" contentmodel="wikitext" pagelanguage="es" touched="2018-02-13T04:56:24Z" lastrevid="103111" counter="15" length="3234" new="" />
      <page pageid="16259" ns="0" title="TIPS AND TRICKS TO PLAY INDIAN MATKA GAME1065413" contentmodel="wikitext" pagelanguage="es" touched="2017-09-09T00:03:14Z" lastrevid="25357" counter="17" length="4899" new="" />
      <page pageid="16286" ns="0" title="TIPS AND TRICKS TO PLAY INDIAN MATKA GAME1105931" contentmodel="wikitext" pagelanguage="es" touched="2017-09-09T06:50:54Z" lastrevid="25447" counter="14" length="4901" new="" />
      <page pageid="16265" ns="0" title="TIPS AND TRICKS TO PLAY INDIAN MATKA GAME1295899" contentmodel="wikitext" pagelanguage="es" touched="2017-09-09T00:05:57Z" lastrevid="25364" counter="13" length="4899" new="" />
    </pages>
  </query>
</api>