535636 Server to Server Transaction Gateway

I am needing a programmer who is experienced in creating a server to server transaction gateway using xml. I simply want to have the ability to enter a search query on my web site and have it pull info from another server. The details of the gateway transaction can be found here. [login to view URL] Once the transaction gateway is in place I will want some management tools built as well. I want to create customer accounts with user ID and password access as well as track each users search activity and also create an accounting feature that allows me to apply a price to each search performed by a user thru the gateway.