Hi Amit,
You can only use our hosted server to test integration with Cerner's implementation of FHIR. Unlike HAPI, Cerner isn't a reference server or open source library for creating a server or client, it's a server we host in production for all our clients.
Specifically, each resource calls out the functionality it supports (write access is only available for a few resources), and the URLs are documented on our
overview page. Registration of applications is documented on the
authorization page.
Regards,
Jenni