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 bkstart="2024-03-04T11:56:00Z" />
  </query-continue>
  <query>
    <blocks>
      <block id="59" user="Pfyzjxrg Pfyzjxrg" by="Motyk" timestamp="2024-03-04T12:00:20Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="58" user="Iemyvpgx Iemyvpgx" by="Motyk" timestamp="2024-03-04T12:00:00Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="57" user="Nvxrlzwu Nvxrlzwu" by="Motyk" timestamp="2024-03-04T11:59:32Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="56" user="Nbnqcvxd Nbnqcvxd" by="Motyk" timestamp="2024-03-04T11:59:02Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="55" user="Oymorqva oymorqva" by="Motyk" timestamp="2024-03-04T11:58:39Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="54" user="Ofggktsk Ofggktsk" by="Motyk" timestamp="2024-03-04T11:58:25Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="53" user="Mjkivenq Mjkivenq" by="Motyk" timestamp="2024-03-04T11:58:05Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="52" user="Nrvykxcg Nrvykxcg" by="Motyk" timestamp="2024-03-04T11:57:36Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="51" user="Mrwdugar Mrwdugar" by="Motyk" timestamp="2024-03-04T11:56:56Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="50" user="Kamagra Kamagra" by="Motyk" timestamp="2024-03-04T11:56:29Z" expiry="infinity" reason="" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>