> Sure, the interface would be simple to implement, but nevertheless it
> requires a customization to the install and Keycloak no longer works
> out-of-the-box.
>
> I'm not saying the interface should not be there, but that it would be
> great to also have a simple HTTP implementation available.

I full appreciate that and it would be great to have what you are proposing. Sadly we have to many things to implement at the moment. If you'd like to contribute something that'd be more than welcome ;)