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-continue>
    <allpages gapfrom="Описание проектов Тенсофт" />
  </query-continue>
  <query>
    <pages>
      <page pageid="67" ns="0" title="Взвешивание транспорта в ТС-Клиент" touched="2017-02-20T21:54:22Z" lastrevid="250" counter="16555" length="2598" />
      <page pageid="2" ns="0" title="Заглавная страница" touched="2012-06-05T12:35:50Z" lastrevid="103" counter="122278" length="2434" />
      <page pageid="52" ns="0" title="Запрос ключа регистрации и активация программы" touched="2012-07-07T22:53:35Z" lastrevid="178" counter="10149" length="4855" />
      <page pageid="53" ns="0" title="Настройка видеокамер" touched="2015-04-23T23:23:46Z" lastrevid="213" counter="26031" length="918" />
    </pages>
  </query>
</api>