Build Ebay Application

We need an ebay application that will allow us to reprice products for our customers, list new items, and download invoices. Must appropriate user sign-in, remembering the API key that this creates, storing all required data in a MySQL Database. Must allow for control over a JSON RESTful API. Must give access to the following actions at eBay: + Create New Listings + View Existing Listings + Amend/Delete Existing Listings + See Transactions in full details This must use the eBay APIs.