An API can support several response codes and projections even in an Idempotent operation. For clients which expect to use the API and mock out the cases, they need to be able to control what case (...
This Can be accomplished using our ServiceV tool. ServiceV is an advanced easy to use Virtualization tool. Please see below links for more information:
Information about ServiceV: https://support.smartbear.com/readyapi/docs/servicev/intro/about.html
How to get started: https://support.smartbear.com/readyapi/docs/servicev/tutorials/creating-virt/index.html
Getting Dynamic responses (Dependant on Header, Query string, resource or body): https://support.smartbear.com/readyapi/docs/servicev/configure/dispatch/index.html
Let me know if you have further questions.