This invention provides a system, method, and software program for providing software intelligence to Radio Frequency Identity (RFID) tags. Utilizing the unique characteristics of the Service Grid, mobile software agents can relocate in close proximity to RFID tagged items. Once associated with the tag, these RFID agents migrate near where items are identified to provide local control, environmentally responsive policy, and ongoing permanent data capture & history. These RFID agents respond to events as circumstances require. They transport data and policy between supply-chain partners when the partners participate in a secure extranet. Enhanced service grids composed of distributed agents, comprising numerous services, facilitates supply-chain security and integration as virtual software service agents, including virtual RFID tags, are directed from one computer to another computer in response to changing conditions.