Stripe allows you to test your webhooks, but if you are running a local development environment such as UwAmp then it is difficult to integrate.
The solution is to use Putty to create a reverse tunnel to publish the local dev enviornment through your webserver.
On NGinx on the VPS server you need to allow the remote port forwarding; edit /etc/ssh/sshd_config and add an entry
GatewayPorts yes
Then restart the ssh daemon
sudo restart ssh
Next in Putty select Connection | SSH | Tunnels and enter the following:
Source port the port on the VPS to listen to
Destination localhost:80
Choose Remove and select Add
Open the Putty Connection.
Now when connecting to the remove port specified this will be delivered via the local tunnel to the development environment.