quick and dirty Netsaint plugins with Perl question

I've never written a plugin...
I have a service I want to check that uses a POST via HTTPS.  Can I simply use Perl's LWP to submit the request and grep the response for the correct response?  Like 

if ($response =~ m/okay/) {
         print "0";   # for return 0
} else {
         print "-1";  # for return -1
}


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