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="20220323141011|21541" />
  </query-continue>
  <query>
    <blocks>
      <block id="21636" user="BORIS_Tankist:eu" by="Der_Adler_443904:eu" timestamp="2024-03-01T09:57:46Z" expiry="infinity" reason="Вандализм" nocreate="" autoblock="" />
      <block id="21633" user="KalCor_20132842:eu" by="Der_Adler_443904:eu" timestamp="2023-08-03T17:35:36Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="21613" user="Matthew9877:na" by="Benser33:eu" timestamp="2022-09-04T08:06:48Z" expiry="infinity" reason="Vandalism" nocreate="" autoblock="" />
      <block id="21603" user="RenamedUser__1423847:ru" by="Barkil:ru" timestamp="2022-08-19T07:10:21Z" expiry="infinity" reason="Добавление бессмысленного текста/мусора" nocreate="" autoblock="" />
      <block id="21598" user="StronkSB:na" by="iDuckman:na" timestamp="2022-08-01T16:49:32Z" expiry="infinity" reason="Vandalism" nocreate="" autoblock="" />
      <block id="21596" user="M_A_S_H_E_E_N:na" by="iDuckman:na" timestamp="2022-08-01T16:14:31Z" expiry="infinity" reason="Removing content from pages" nocreate="" autoblock="" />
      <block id="21587" user="LeFauc0nNoir:eu" by="Wareagle15:eu" timestamp="2022-06-14T09:42:46Z" expiry="infinity" reason="Insertion de contenu sans aucun sens et de déchets dans les pages : Ecrire sur le Wiki Ok quand cela reste neutre et surtout pas grossier" nocreate="" autoblock="" />
      <block id="21558" user="Korrica:ru" by="Barkil:ru" timestamp="2022-04-20T10:38:24Z" expiry="infinity" reason="Удаление содержимого страниц" nocreate="" autoblock="" />
      <block id="21545" user="" by="" timestamp="2022-03-23T14:25:02Z" expiry="infinity" reason="Спам-ссылки на внешние сайты" nocreate="" autoblock="" />
      <block id="21544" user="BOJ1KODAB:ru" by="Barkil:ru" timestamp="2022-03-23T14:18:32Z" expiry="infinity" reason="Спамер сменил ник" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>