Is there a demo with an example implementation?

[k00ni]

Is there a very basic example available how to implement the protocol? Such as a mini-HTML file with some RDFa providing catalog info or an example JSON response of a web service.

I am still very new to all of this but at least DCAT and ODRL (ref) related content is to be published. Besides, there is communication between web services/programs as mentioned here (between Consumers and Providers).

If there is nothing available yet, are there plans to change that?

[arnoweiss]

I think there's some wrong expectation implied in this question. This protocol defines a set of HTTP endpoints that are designed without any application having to be aware of RDF. Look at the spec, refer to the linked json-schemas in the messages and implement the http bindings.

That said, if you need a ready-to-run setup, the Eclipse EDC MVD will be a good start.