You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allpages>
      <p pageid="3273" ns="0" title="BaseFlight" />
      <p pageid="3271" ns="0" title="Baseflight" />
      <p pageid="3486" ns="0" title="Bebop 2" />
      <p pageid="4979" ns="0" title="Best hyip" />
      <p pageid="3277" ns="0" title="BetaFlight" />
      <p pageid="3717" ns="0" title="Betaflight Configurator" />
      <p pageid="2484" ns="0" title="BirdsEyeView Aerobotics - FireFLY6" />
      <p pageid="4308" ns="0" title="Bitcoin на рубли: куда стоит обращаться?" />
      <p pageid="3526" ns="0" title="BlackBox" />
      <p pageid="717" ns="0" title="Blackmagic Design Cinema Camera" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Blade 200 QX" />
  </query-continue>
</api>