diff --git a/mdmcertcheck/mdmcertcheck.sh b/mdmcertcheck/mdmcertcheck.sh
index 4d17713..8e90b2f 100644
--- a/mdmcertcheck/mdmcertcheck.sh
+++ b/mdmcertcheck/mdmcertcheck.sh
@@ -4,15 +4,46 @@
 
 export LC_ALL=""
 export LANG="en_US.UTF-8"
-VERSION="0.1"
+VERSION="0.3"
 
 CERTLIST="certlist.cfg"
+CTIMEOUT="1"
+
+error(){
+	echo "-1"
+	exit 1
+}
 
 JSON=""
 ##### PARAMETERS#####
 METRIC="$1"
 ITEM="$2"
 
+CERT_DOMAIN=""
+CERT_IP=""
+CERT_PORT=""
+CERT_BODY=""
+
+parse_item(){
+	TITEM=$1
+	#parse item 
+	#check empty item
+	if [ -z "$TITEM" ]
+      then
+	  		error
+    fi
+	CERT_DOMAIN=`echo $ITEM | awk -F"|" '{print $1}'`
+	CERT_IP=`echo $ITEM | awk -F"|" '{print $2}'`
+	CERT_PORT=`echo $ITEM | awk -F"|" '{print $3}'`
+}
+
+get_cert(){
+	if ! CERT_BODY=$( echo | timeout "$CTIMEOUT" openssl s_client -servername "$CERT_DOMAIN" -verify_hostname "$CERT_DOMAIN" -connect "$CERT_IP":"$CERT_PORT" 2>/dev/null )
+	then
+		error
+	fi
+}
+
 case "$METRIC" in
 discovery)
 	#records from the config file
@@ -31,6 +62,33 @@ discovery)
 	exit 0
 ;;
 
+isexist)
+	#validating the cert
+	parse_item $ITEM
+	get_cert
+	# if get_cert has not en error then all is ok.
+	echo 1
+;;
+
+valid)
+	#validating the cert
+	parse_item $ITEM
+	get_cert
+	# Note: new openssl versions can print multiple return codes for post-handshake session tickets, so we need to get only the first one
+	RET=$( echo "$CERT_BODY" | grep -E '^ *Verify return code:' | sed -n 1p | sed 's/^ *//' | tr -s ' ' | cut -d' ' -f4 )
+	if [ "$RET" -eq "0" ]; then echo "1"; else echo "0"; fi
+
+;;
+
+valid_status)
+	#validating the cert
+	parse_item $ITEM
+	get_cert
+	# Note: new openssl versions can print multiple return codes for post-handshake session tickets, so we need to get only the first one
+	RET=$( echo "$CERT_BODY" | grep -E '^ *Verify return code:')
+	echo $RET;
+;;
+
 script.version)
 	echo $VERSION
 ;;
@@ -38,8 +96,11 @@ script.version)
 help)
 echo "please use these params
 {
-discovery
-script.version
+discovery		- discovery items from config file
+isexist			- the script has access to server with cert
+valid			- the cert is valid (1|0)
+valid_status	- the cert status in full text
+script.version	- current version of this script
 }"
 ;;