REST API Webservices to trigger PO creation from a Sales Order

Summary:

Hi,

We have a requirement to surpass the PR creation step and directly create the PO based on the supply order generated for back-to-back orders. According to the discussion mentioned below, auto creation of the PO is possible if there is a Blanket Purchase Agreement (BPA).

However, we are unable to maintain a BPA for all the items for which Sales Orders should be created and the requirement is to always surpass the PR creation step and directly generate the PO based on the Sales Order.

Thus, please mention if there is any alternative way to auto generate the PO or if there is a webservice to trigger PO creation from Sales Order.