11.5.10 Payments Interface
There are many postings regarding the lack of public APIs for interfacing payments to Oracle Payables. Piecing a few of these together and combing through trace files, I was able to develop API calls to import payments successfully. I did not address Workflow tables/columns. Here is the generic version of what I developed...
Link to code - Oracle 11.5.10 AP Payment Interface
Hope this helps some of you!