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="20180109215018|35" />
  </query-continue>
  <query>
    <blocks>
      <block id="68" user="Zzz888" by="Different55" timestamp="2018-05-10T20:19:25Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages" nocreate="" autoblock="" />
      <block id="64" user="Mysterion" by="Zoey2070" timestamp="2018-05-08T19:59:18Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages" nocreate="" autoblock="" />
      <block id="59" user="Subzero" by="Jet" timestamp="2018-05-06T05:03:25Z" expiry="infinity" reason="Abusing multiple accounts: shoo" nocreate="" autoblock="" />
      <block id="57" user="Zyhrllos" by="Different55" timestamp="2018-04-04T16:04:20Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages" nocreate="" autoblock="" noemail="" />
      <block id="55" user="Medeia" by="Jet" timestamp="2018-03-14T21:03:30Z" expiry="infinity" reason="Removing content from pages: lmao bye" nocreate="" autoblock="" />
      <block id="51" user="Rudik4" by="Different55" timestamp="2018-02-10T15:58:00Z" expiry="infinity" reason="shoo" nocreate="" autoblock="" />
      <block id="49" user="Rudik3000" by="Jet" timestamp="2018-02-07T20:03:09Z" expiry="infinity" reason="alt of whirl" nocreate="" autoblock="" />
      <block id="48" user="Rudik" by="Jet" timestamp="2018-02-07T20:02:14Z" expiry="infinity" reason="alt of whirl" nocreate="" autoblock="" />
      <block id="43" user="Whirl" by="Zyhrllos" timestamp="2018-01-31T23:23:47Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages: Messing with pages, inserting false/revenge information, porting over to wikia?? Like, seriously?" nocreate="" autoblock="" />
      <block id="41" user="Pssytheanswer" by="Zyhrllos" timestamp="2018-01-21T22:11:45Z" expiry="infinity" reason="Intimidating behavior/harassment: Mass vandalism" nocreate="" autoblock="" />
    </blocks>
  </query>
</api>