REST API for Reassigning Buyers

Summary:

Availability of REST / SOAP API to Reassign Buyer for Requisition Lines

Content (required):

We have a requirement if the Negotiation Required Flag is checked in a Requisition Line, the Requisition Line should be assigned to a Buyer in a Sourcing Team and not to the default buyer in Purchasing Team as set by the Buyer Assignment Rules. I have checked in the Buyer assignment rules but there is it not possible to assign a buyer based on the Negotiation Required Flag.

Hence, we are trying the possibility of achieving this using a REST / SOAP API.

Let us know if any standard API is available to achieve this.