API Center assets include APIs and processes, such as Application Integration processes.
Create the assets you need to satisfy your business needs. A template is available for REST API assets. You can use the template as-is, or you can use it as a head start and customize it to meet your needs.
You can use assets in multiple projects. All assets must be part of at least one project. You can't delete assets that are published APIs.
To prepare an existing API design for import/export, you need to make the API design exportable. Open the API design, click on "Make Exportable," then edit and save the existing API.