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>
    <alllinks galcontinue="Bs:template:-" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Ba:Ҡалып:Tlinks" missing="" />
      <page ns="0" title="Ba:Ҡалып:Ҡалып" missing="" />
      <page ns="0" title="Backspace" missing="" />
      <page ns="0" title="Be-x-old:Шаблён:Асноўны артыкул" missing="" />
      <page ns="0" title="Be-x-old:Шаблён:Зноскі" missing="" />
      <page ns="0" title="Be-x-old:Шаблён:Паведамленьне" missing="" />
      <page ns="0" title="Be-x-old:Шаблён:Ш" missing="" />
      <page ns="0" title="Bg:Шаблон:CopyrightByWikimedia" missing="" />
      <page ns="0" title="Bg:Шаблон:Ш" missing="" />
      <page ns="0" title="Bn:Template:মূল নিবন্ধ" missing="" />
    </pages>
  </query>
</api>