This documentation gives you real time experience on PayU Biz APIs you can interact with.
On hitting the API with params, it gives you following:
i). Status code of API.
ii). Response of the API in response body
iv). Schemas of the API
v). CURL request
vi). Error codes with reasons
This API is used to check the status of refund/cancel requests. Whenever the cancelrefundtransaction API is executed successfully, a Request ID is returned in the output parameters for that particular request.