How do we validate the Rest API Requests and Responses? For XML based request and response we have something called XSD which is used to validate the request & response. But what about the requests & responses in JSON Format ?

For that too we have something called JSON Schema. Follow the
below link to learn more about it.

http://www.jayway.com/…/json-schema-validation-with-rest-a…/

This tells us how do we validate the request and response.

Want to know more about json-schema?

Just follow:
http://json-schema.org/documentation.html