A method and apparatus for accessing a service belonging to a service provider is described. A first discovery procedure may be performed to discover at least one service provider, and a bootstrap procedure may be performed with at least one discovered service provider. A second discovery procedure may then be performed to determine an available service capability layer (SCL) supported by the at least one service provider. The first discovery procedure sends a service provider discovery request that includes information for querying the record database, determines a matching service provider discovery record, and a service discovery function record that matches the query in the service provider discovery request Receiving a service provider discovery response that includes the list may be included. At least one service provider for bootstrapping may be selected from the service discovery function record list. Various versions of the second discovery procedure are described.