When working with Exact webhooks you have the possibility to subscribe to so called topics. Implementing webhooks makes your application and Exact connected without delay.
I could not find the list of available topics on the developer page. When searching some more I found this list on a forum:
Also the example of the notification you receive isn't correct, here are the parameters your receive:
If you want to start working with webhooks register for a free account at the app partner center. You are provided with a dashboard and some pages that gives insight in app usage and registered webhooks. Also a log of notifications that are send is provided.
Important to notice is that webhooks will only work with SSL.
Happy coding!