Pushover alert script for Zabbix

pushover.sh

#!/bin/bash

### USAGE
# Enter {user_token}@{api_token} as the recipient of the user media type configuration ("Send to")
###

USER=$(echo $1 | cut -f1 -d@)
APPLICATION=$(echo $1 | cut -f2 -d@)

EVENT=$2
NOTIFICATION=$3

HEADER=$(echo $EVENT | awk -F: '{print $1}')

PRIORITY=0 # Pushover default; -1 ignores quiet hours

case "$HEADER" in
"Info"|"Information"                            ) PRIORITY=0 ;;
"Warning"|"WARNING"                             ) PRIORITY=0 ;;
"Problem"|"PROBLEM"|"Average"|"AVERAGE"         ) PRIORITY=0 ;;
"High"|"HIGH"                                   ) PRIORITY=1 ;;
"Disaster"|"DISASTER"|"Emergency"|"EMERGENCY"   ) PRIORITY=1 ;;
"Recovery"|"RECOVERY"                           ) exit 0 ;;
esac

curl -s -F "user=${USER}" -F "token=${APPLICATION}" -F "message=${NOTIFICATION}" -F "priority=${PRIORITY}" --retry 400 --retry-delay 5 https://api.pushover.net/1/messages.json

Also you need to add three parameters to the Media Type manually:
{ALERT.SENDTO}
{ALERT.SUBJECT}
{ALERT.MESSAGE}