Need an XML API setup, code provided by us already

Agent API allows clients' applications to securely connect directly to the X Application/Web Server and submit transaction data. All requests will be initiated by the client. The client submits the data as HTTP-Post. The Http Post must consist of a set of fields that are required for each transaction, and a set of fields that are optional. The server responds with an XML document of transaction data and result via same HTTP stream (Note: X Agent API XML document is NOT SOAP compliant). XML document has common structure for all transactions except for the output section where you will receive the command specific result (details on the XML document structure is on the "Command Output section"). To implement, a developer would design a script that does the following: Obtains all of the information needed to process a transaction. Initiates a HTTP Post from their server to [login to view URL] Receives the response (XML Document over HTTP) from the gateway and processes the response to display the appropriate result to the end user. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform XML, API, PHP, Linux