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>
    <blocks bkcontinue="20120522153539|150" />
  </query-continue>
  <query>
    <blocks>
      <block id="198" user="Arschloch der Wichser" by="DmdM" timestamp="2019-05-15T12:29:58Z" expiry="infinity" reason="Ungeeigneter Benutzername" nocreate="" autoblock="" />
      <block id="194" user="Antguy" by="Icon" timestamp="2017-04-17T18:36:03Z" expiry="infinity" reason="Einstellen unsinniger Inhalte in Seiten" nocreate="" autoblock="" />
      <block id="172" user="Barristan" by="Witzman" timestamp="2014-05-30T21:15:56Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="168" user="Anonymous" by="DmdM" timestamp="2013-03-05T08:01:44Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
      <block id="161" user="CharleyBla" by="DmdM" timestamp="2012-08-10T12:57:51Z" expiry="infinity" reason="" nocreate="" />
      <block id="160" user="CharleyHro" by="DmdM" timestamp="2012-07-29T16:31:31Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
      <block id="154" user="FixToolbox" by="DmdM" timestamp="2012-05-23T10:56:49Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
      <block id="153" user="Mgagliardip8" by="DmdM" timestamp="2012-05-23T10:56:45Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
      <block id="152" user="Oallowayg7" by="DmdM" timestamp="2012-05-23T10:56:42Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
      <block id="151" user="WinnieGushi" by="DmdM" timestamp="2012-05-22T20:49:36Z" expiry="infinity" reason="Spam, Werbung" nocreate="" />
    </blocks>
  </query>
</api>