diff --git a/files/lld_certlist.py b/files/lld_certlist.py
new file mode 100755
index 0000000..11aad1b
--- /dev/null
+++ b/files/lld_certlist.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+import json
+import os
+import re
+
+import sys
+
+if __name__ == "__main__":
+  data=[]
+  filelist = os.listdir( '/etc/letsencrypt/live/' )
+  cert=[]
+  r=re.compile("(README|.*-[0-9]{4}$)")
+  certs = list(filter(r.match, filelist ))
+  for line in filelist:
+    if line == "README": continue
+    if re.search( ".*ORIG$", line) : continue
+    if re.search( ".*-[0-9]{4}$", line) : continue
+    cert.append( line )
+	 
+  data = [{"{#CERT}": line.strip()} for line in set(cert)]
+  print(json.dumps({"data": data}, indent=4))
+
diff --git a/files/user_parameter_certificate_discovery.conf b/files/user_parameter_certificate_discovery.conf
new file mode 100644
index 0000000..039ee17
--- /dev/null
+++ b/files/user_parameter_certificate_discovery.conf
@@ -0,0 +1 @@
+UserParameter=certificate.discovery,/etc/zabbix/scripts/lld_certlist.py
\ No newline at end of file