diff --git a/nagios/check_modjk.py b/nagios/check_modjk.py
new file mode 100755
index 0000000..9fae50c
--- /dev/null
+++ b/nagios/check_modjk.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python
+
+'''
+Nagios compatible plugin to check Apache Modjk
+
+requires
+  - Python >= 2.6
+  - status worker enable
+'''
+
+from optparse import OptionParser
+import urllib2
+import re
+from twisted.plugins.twisted_reactors import default
+
+EXIT_CODE = {
+	'OK': 0,
+	'WARN': 1,
+	'CRIT': 2,
+	'UNKNOWN': 3,
+}
+
+def prepareOpts():
+	'''
+	Parse option from the shell
+	'''
+	
+	def help():
+		print 'How many workers are in a non-OK state'
+		print ''
+		parser.print_help()
+	
+	def err( string ):
+		print 'Error: {0}'.format( string )
+		help()
+		exit(1)
+	
+	parser = OptionParser()
+	parser.add_option('-u', '--url', dest='url', type='string', help='modjk status worker url')
+	parser.add_option('-c', '--critical', dest='critical', type='int', help='warning threshold', default=-1)
+	parser.add_option('-w', '--warning', dest='warning', type='int', help='critical threshold', default=-1)
+	parser.add_option('-t', '--timeout', dest='timeout', type='float', help='how many seconds to wait for each http request', default=5)
+	(opts, args) = parser.parse_args()
+	
+	# Input Validation
+	if not opts.url:
+		err('missing Modjk Status http url')
+	if opts.warning > opts.critical:
+		err('-w can not be greater than -c')
+	if opts.warning < 0 or opts.critical < 0:
+		err('-w and -c must be a positive number')
+	
+	return opts
+
+def getErrorWorkers(url, timeout):
+	'''
+	Query the Modjk status worker for bad workers
+	'''
+	
+	ret = []
+	response = urllib2.urlopen(url+'?command=list&mime=prop', timeout=timeout).read()
+	for line in re.findall( r'worker\..*\.state=.*', response, re.M):
+		if not line.endswith('OK'):
+			ret.append(
+				line.split('.',1)[1].split('.',1)[0]
+			)
+	return ret
+
+
+if __name__ == '__main__':
+	opts = prepareOpts()
+	
+	try:
+		errorWorkers = getErrorWorkers(
+			opts.url, opts.timeout
+		)
+	except urllib2.URLError as e:
+		print 'UNKNOWN: Cant query jkstatus worker for data'
+		exit(EXIT_CODE['UNKNOWN'])
+	
+	count = len(errorWorkers)
+	state = ''
+	if count < opts.warning:
+		state = 'OK'
+	elif count >= opts.warning and count < opts.critical:
+		state = 'WARN'
+	else:
+		state = 'CRIT'
+	
+	print '{0}: {1} workers are in Err state {2}'.format(
+		state, count, ','.join(errorWorkers)
+	)
+	exit(EXIT_CODE[state])