​Alessio here is the discussion thread.  Thought reply all was happening.

>>>>>> Heiko wrote:
>>>>>> While working on the microprofile rest client I noticed that a test registers a ParamConverter
>>>>>> on a JAX-RS client. It’s intended to modify the invocation parameters prior to the actual HTTP
>>>>>> request. It doesn't seem to be executed by the RESTeasy client implementation and I wonder if
>>>>>> this intentionally being ignored On the client side (maybe a spec thing?)
>>>>>>
>>>>>> Regards, Heiko
>>>>>>
>>>>> Rebecca wrote:
>>>>>This is executed on the server side of resteasy not the client side.
>>>>>
>>>> Heiko wrote:
>>>> Yes, I know it works for the server side, but is there a reason why that shouldn’t be with a client?
>>>
>>> Rebecca wrote:
>>> I would think it would be desirable to transmit the users *original* data and process it on the backend
>>> rather than alter the original data and transmit that.  I do not find any spec statements related to this
>>> other than converters are discussion in the section on producers.  My guess is, this is the common
>>> means of handling this among jaxrs implementations.
>>>
>> Heiko wrote:
>>
>> Yes, I agree and would have thought the same. But it appears as if the CXF impl treats it differently.
>>
> Rebecca wrote:
>
> I suggest filing an enhancement request for Resteasy.
> It would be most helpful to provide in the jira a simple app to demonstrate the issue.​