If you really want to push the envelope check to see if the website returns a set value. For example we can use this not only to see if a service is running but if it is actually talking to a server and returning an expected value.
-- If the website is unavailable you will get an sql state of 38000 or an sql code of SQL4302.
values systools.httpgetclob('http://dekkohome.corp.dekko.com/gdintranet.nsf/edge', '');
-- To check for SQL4302
MESSAGE_ID, -- The message ID for this message.
MESSAGE_TEXT -- The first level text of the message including tokens.
from table(qsys2.joblog_info('*')) A
-- where message_id='SQL4302'
order by ordinal_position desc
fetch first row only;
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