In

API Center

, you can use the top-down approach to design and publish APIs by creating operations, mapping Application Integration processes, and configuring policies. Similarly, you can use the bottom-up approach to create published APIs directly from existing Application Integration processes. For more information about published API design approaches, see Published APIs.

You can generate or change the design of the APIs that you publish using the bottom-up or implementation-first approach. If you had previously published an API in API Manager and migrated the API to API Center, you can update the API in API Center by creating a designed API. You can update and activate only the REST APIs that are directly published from existing Application Integration processes.