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>
    <blocks>
      <block id="4" user="2405:8100:8000:5CA1:0:0:0:0/64" by="GreenReaper" timestamp="2025-09-10T03:35:00Z" expiry="infinity" reason="Vandalism" nocreate="" noemail="" />
      <block id="3" by="GreenReaper" timestamp="2025-09-10T03:24:33Z" expiry="2025-09-24T03:24:33Z" reason="당신의 IP 주소는 최근에 &quot;[[User:こけ.|こけ.]]&quot; 사용자가 사용하였기 때문에 자동으로 차단되었습니다.&#10;こけ. 사용자가 차단된 이유는 다음과 같습니다: &quot;Vandalism&quot;" automatic="" nocreate="" />
      <block id="2" user="こけ." by="GreenReaper" timestamp="2025-09-10T03:24:33Z" expiry="infinity" reason="Vandalism" nocreate="" autoblock="" noemail="" />
    </blocks>
  </query>
</api>