The JsonBindingProvider has the following annotations:

@Produces({"application/json", "application/*+json", "text/json", "*/*"})
@Consumes({"application/json", "application/*+json", "text/json", "*/*"})

And then we have this code checking it has something to do with JSON in the end:

public static boolean isSupportedMediaType(final MediaType mediaType) {
      return mediaType.getSubtype().equals(JSON) || mediaType.getSubtype().endsWith(PLUS_JSON);
   }

I think we should be consistent with the ResteasyJackson2Provider in which we restricted the matches (compared to the provider provided by Jackson):

@Consumes({"application/json", "application/*+json", "text/json"})
@Produces({"application/json", "application/*+json", "text/json"})

By the way, it's not just about being consistent, if the provider is registered for /, I can't eliminate it from the global candidates even if I'm just working with XML if I end up having this provider in the classpath.

And if we need to support more, we can still push more things there (and probably keep the list consistent between JSON-B and Jackson).