you can use the police or u can create your own polices .once your are deployed your API you will get the API URL with that you can call your API with CPI.Flow will be like.SENDER--> CPI ---> API.
Hi,Yes we can archive through the CPI by using the poll enrich. you can refer this link :- https://community.sap.com/t5/technology-blogs-by-sap/cloud-integration-use-poll-enrich-with-sftp-adapter/ba-p/13518650