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="20110708220020|290" />
  </query-continue>
  <query>
    <blocks>
      <block id="308" user="Tippspiel" by="Rakoon" timestamp="2012-02-24T19:55:25Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="306" user="Earsplittingvac825" by="Lysergic" timestamp="2012-02-03T17:56:31Z" expiry="infinity" reason="Inserting false information: Spam editting" nocreate="" autoblock="" allowusertalk="" />
      <block id="304" user="JustinHoward" by="Kizeren" timestamp="2011-12-02T05:00:02Z" expiry="infinity" reason="Inserting nonsense/gibberish into pages: I found this account trying to insert random stuff into the FAQ" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="302" user="Zhang11" by="Rakoon" timestamp="2011-11-02T10:08:15Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="300" user="Rere" by="Rakoon" timestamp="2011-11-02T10:06:24Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="298" user="Chjchj" by="Rakoon" timestamp="2011-10-08T19:52:45Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="296" user="Dffddf" by="Rakoon" timestamp="2011-10-08T19:52:38Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="294" user="Pepe" by="Rakoon" timestamp="2011-08-02T09:04:10Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="293" user="Vaniron" by="Kizeren" timestamp="2011-07-08T22:01:28Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
      <block id="291" user="Valetavi" by="Kizeren" timestamp="2011-07-08T22:00:50Z" expiry="infinity" reason="Spamming links to external sites" nocreate="" autoblock="" noemail="" allowusertalk="" />
    </blocks>
  </query>
</api>