Notification when an IP address gets a MAC

I want to be notified by webhook when there is a change in IP → ARP (like when a new IP address is received). Is it possible?

I do use pusbullet and get a message (phone/web (pusbullet plugin))when a new IP are assigned from the DHCP.
To get this to work I do use a semi static IP (convert to IP and delete after a year not seen)