This would expose protected information (the data of the item) without any security whatsoever. I don't think we are in any rush to implement something like this. Our webhooks system is capable of solving your use case if you implement a proxy layer. I know it's not a one-step implementation, but we have to consider the security aspect.
You can always make your proxy layer generalized so you don't have to re-create it for every app you want to expose in this way.