Notification Webhook is an app for Android that allows you to send notifications from your Android device to any web address for processing notifications on your own apps or receive in your smartwatch.
The companion app is written on top of the Apache Cordova framework.
In order for the app to be able to pick up your phone notifications, you'll need to explicitly grant it permissions.
Go to your phone settings, Notifications>Notification access, and tick
the Notification-webhook box.