Hi Hari

Please see the below URL for detail steps on REST integration. https://community.pega.com/knowledgebase/articles/create-and-test-soap-sap-and-rest-data-sources.

Thanks

You need to create your own class which has the data model that you desire, which represents the data that will be going in/out of your application.

Alternative way through wizard is below :

you have to create service REST and service package from "+Create → Integration Service → Service REST" only.

for all the properties creation that are used in the rest service, i have used connector metadata wizard and uploaded a XSD so pega will create classes, properties, Data transforms.