Abstract: Exemplary methods and systems herein provide a central marketplace for a requestor to request a product or service from an internal inventory or external vendor, receive approval for the request, and have the approved request fulfilled. In one embodiment, a computer-implemented method comprises method for requesting a product or service comprises presenting, by a computer, a catalog to a graphical user interface of a requestor of a corporate entity, wherein the catalog comprises a product or service selected from a database storing records for an internal inventory of the corporate entity and a plurality of databases affiliated with external vendors that are not a parent, subsidiary, or related to the corporate entity; and receiving, by a computer, a selection from the requestor of a product or service of the catalog. The catalog can be synchronized in real-time or periodically with the external vendors' products and services.