There was a desire during a recent workshop to provide for https://tools.ietf.org/html/rfc7592. Is this RFC was indicated as supported in the OAuth metadata then a client could use it to check whether it is already registered with the Authorization server. This should not be mandatory however as it isn't necessarily widely supported. Clients should fall back to an approach where they try to obtain tokens and re-register as a client if required on error.
There was a desire during a recent workshop to provide for https://tools.ietf.org/html/rfc7592. Is this RFC was indicated as supported in the OAuth metadata then a client could use it to check whether it is already registered with the Authorization server. This should not be mandatory however as it isn't necessarily widely supported. Clients should fall back to an approach where they try to obtain tokens and re-register as a client if required on error.