Changing default route via script

Hello,

is there any way to change the default route from the script ? After reading for a while, it seems like Netgear never opened any API on routers so hacking my way in would be the way to go. I do not want to burn my cycles on something which is well known in the community. If you have any ideas how to do that please share ...

The whole idea is to avoid putting another device which will do failover between 2 routers. I would rather run a "pinger" on my laptop which is constantly turned on and based on the availability of the internet, script would log in to RBR and change its default route.

thank you !