@JoãoFarias 1. I tried to convince them but they said they don't have time to change the implementation for now. 2. They are getting this dynamically generated data by storing it in some database/file, but they right now don't want to provide access as they think something might go wrong if they give us the access. I am trying my best to convince them to help with 2nd option at least. But I thought let me ask by the time final decision comes.

@Amol Yes my requirement are similar to what you are saying. I want to provide websocket different inputs and I am expecting the expected outputs and need to have validation for the same. I have right now started with Karate tool and what I have started it have posted it in answer.

@KatePaulk Thanks but now I have solved it using Karate tool, and posted the solution which worked for me.

@JananiKrishnan If my answer has helped you in solving your problem, can you please mark it as accepted and upvote it as well?