To create a COBOL program-based operation

In the Interface Mapper, right-click Operation, and click New.

Define the new operation by specifying:

A name for the new operation
A program
An entry point, which you select from the list of entry points available in the program

If you want to automatically create interface fields for all of the fields associated with the entry point selected, check Create Default Mapping.

If you require any user exits for your operation, specify them on the User Exits tab.

For a JSON (RESTful) Web Service operation, you can specify a path and HTTP method on the Path/HTTP tab.

Note: Alternatively, if you want to automatically identify RESTful API resources from the selected entry point and create operations for each resource, click Enable API Resources to switch to the API Resources tab, where you can view and edit the identified resources.