OAuth 2.0 Rich authorisation requests (RAR)
RAR is a new OAuth 2.0 extension that enables applications to specify fine-grained authorisation details in requests, responses and tokens.
Grant Management for OAuth 2.0
Grant management is a new OAuth 2.0 extension developed at the FAPI working group. It provides way for clients to manage their grants with an authorisation server in a explicit and accountable way.