API call to Create and retrieve the newly created position

we have a requirement to Create new positions through an API call and retrieve the newly created position information back into the third party tool.

alternatively, we can use a HDL to create positions - have a Source System ID as a unique identifier to tie the new position to the load file.

we need to retrieve the source system owner and source system ID through an API call.

reviewed the API documentation available in Oracle support but nothing seems to be available that refers to Source system ID