I write the developer documentation for AuctionWorx, an MVC-based auction and fixed price sales platform.
A new AuctionWorx customer asked about integration with ShipStation that he uses on his other sites.
I put together a developer tutorial, code sample, and testing instructions at http://www.rainworx.com/dev-docs/#shipstation_integration.htm
. It shows how ShipStation can pull order information and update AuctionWorx invoices when an order ships.
It should also be helpful to anyone who needs to do an integration in Microsoft ASP.NET.