The client endpoint is an endpoint used by the authorization endpoint to return authorization responses containing authorization credentials to the client via the resource owner user-agent (typically a browser).
The client endpoint is also known as:
After completing its interaction with the resource owner, the authorization endpoint directs the resource owner's user-agent back to the client via a redirection endpoint.
The redirection endpoint URI:
The client's redirection endpoint can be defined :
during the client registration process
With the authorization request, you can defined the redirection uri using the redirect_uri request parameter.