How to get custom parameter in contact rest api v4.1

Hello

How can i get custom param in contact rest v4.1 api json response . I want 200 successfully standard response .

Hi,
the http status code should be delivered within the header already (as you can see it in postman too).

i want in my response with custom message. Is it possible to change the core code of contact rest api ?

Then you should have a look here:

there is a paragraph describing how to add new API methods. I wouldn’t recommend to modify existing API methods, as it could cause issues with existing integrations and it’s not upgrade-safe.

But i want to add my custom message in Add contact rest api .

Hello @diligent

give me help for this.
I have require to add custom message into my contact rest api.