Both services are available for integration by merchants either (i) in the legacy way via locally installed software from BankID (BankID-server) or (ii) in a modern way via an IDP-options in the OpenID Connect Provider from BankID Norge.
See availability and access for the OIDC Provider in its BankID pilot configuration for instructions on how to register at merchant application for the BankID B2C services.
Please try out the set of BankID test tools to experience the BankID B2C services from an end user perspective.