Integrate PaySimple in my asp.net website

I need to integrate PaySimple site in my asp.net website. My requirement is to just capture information required by PaySimple site and direct user to the PaySimple Website to comp开发者_JAVA百科lete the transaction and return back to my site with response message.

I want to know what are the parameters required by the Paysimple website and how to pass these parameters to paysimple site. Please suggest me a way to do the things. I am using c#.

They have API that is based on well-known technologies like SOAP or JSON, so you can use WebReference for accessing their web service and getting or sending data to it. You can read more about API here