Hi, I've written a stock analysis software and instead of selling individual copies outright (as most people do), I would like to have it 'pay-per-use' over a website. It's a Windows program written in Delphi, that basically runs one big 'batch job' on the data of 3500 stocks and spits out selections. Ideally I'd like to have my software sitting on a server somewhere, the customer comes to my website, makes a small payment of a few dollars to Paypal (or whatever), then gets access to my software over the web so he can run his one-time batch job analysis. Then when he's done, he logs out (or his allotted time expires and he gets logged out). And that's it.
Can this be done? Are there payment processing companies or e-commerce companies that have a turnkey solution to such a thing?