Send SAP data to external web services

Hello experts,

Can anyone provide me with a tutorial or example how to create a PI/PO example to send data to external web services?

Most of the tutorial I found is about consuming external web services. Which is SAP sends a request and the external party will send back a response. I want to have the other way around. SAP sends data to an external party not request info.

So it will be an asynchronous call. SAP send data to an external party, and it will be saved on the external party database.