NTFY.SH

curl \
    -H "Email: lah.data@gmail.com" \
    -H "Tags: warning,skull,backup-host,ssh-login" \
    -H "Priority: high" \
    -d "Unknown login from 5.31.23.83 to backups.example.com" \
    ntfy.sh/alerts
 
curl -H "Email: lah.data@gmail.com" -d "You've Got Mail" ntfy.sh/alerts
 
curl -d "You've Got Mail" "ntfy.sh/alerts?email=lah.data@gmail.com" ntfy.sh/alerts