All, it seems there is a typo in the Client Registration documentation lying at: http://keycloak.github.io/docs/userguide/keycloak-server/html/client-regi... Existing snippet: String initialAccessToken = "eyJhbGciOiJSUzI1NiJ9.eyJqdGkiOiJmMjJmNzQyYy04ZjNlLTQ2M...."; ClientRepresentation client = new ClientRepresentation(); client.setClientId(CLIENT_ID); ClientRegistration reg = ClientRegistration.create().url(" http://keycloak/auth/realms/myrealm/clients").build(); reg.auth(Auth.token(initialAccessToken)); client = reg.create(client); String registrationAccessToken = client.getRegistrationAccessToken(); Corrected snippet: String initialAccessToken = "eyJhbGciOiJSUzI1NiJ9.eyJqdGkiOiJmMjJmNzQyYy04ZjNlLTQ2M...."; ClientRepresentation client = new ClientRepresentation(); client.setClientId(CLIENT_ID); ClientRegistration reg = ClientRegistration.create().url(" http://keycloak/auth/realms/myrealm/*clients-registrations*").build(); reg.auth(Auth.token(initialAccessToken)); client = reg.create(client); String registrationAccessToken = client.getRegistrationAccessToken(); Please confirm and if valid, take care with that. _______________________________________________ keycloak-user mailing list keycloak-user(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/keycloak-user