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="20190105131410|1319" />
  </query-continue>
  <query>
    <blocks>
      <block id="1337" user="朴英浩2" by="Mono" timestamp="2020-06-13T01:59:28Z" expiry="infinity" reason="" nocreate="" autoblock="" noemail="" />
      <block id="1334" user="風林火山" by="Yosuke" timestamp="2020-06-11T16:37:00Z" expiry="infinity" reason="複数アカウントの不正利用" nocreate="" autoblock="" noemail="" />
      <block id="1332" user="上杉謙信" by="Yosuke" timestamp="2020-06-11T16:21:18Z" expiry="infinity" reason="複数アカウントの不正利用" nocreate="" autoblock="" noemail="" />
      <block id="1330" user="朴英浩" by="Yosuke" timestamp="2020-06-11T16:20:12Z" expiry="infinity" reason="ページから内容の除去" nocreate="" autoblock="" noemail="" />
      <block id="1328" user="セリーヌ・ベルナデット・ノエミ・ブアン" by="Yosuke" timestamp="2020-06-10T01:34:56Z" expiry="infinity" reason="ページから内容の除去" nocreate="" autoblock="" noemail="" />
      <block id="1326" user="ツェツィーリエ" by="Mono" timestamp="2020-06-09T01:46:22Z" expiry="infinity" reason="理由なき白紙化" nocreate="" autoblock="" noemail="" />
      <block id="1324" user="ティアーヌ" by="Mono" timestamp="2020-05-30T15:32:03Z" expiry="infinity" reason="" nocreate="" autoblock="" noemail="" />
      <block id="1323" user="ガクトマン" by="Yosuke" timestamp="2019-02-16T02:58:22Z" expiry="infinity" reason="" nocreate="" autoblock="" />
      <block id="1321" user="Botbotbotbot" by="Yosuke" timestamp="2019-02-05T01:35:23Z" expiry="infinity" reason="外部サイトへのスパムリンク追加" nocreate="" autoblock="" />
      <block id="1320" user="The Pioneer" by="Yosuke" timestamp="2019-01-05T13:14:43Z" expiry="infinity" reason="" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>