Track API PaySimple API Payments Billing, Business Online payment processing service for ACH and Credit Cards With industry low transaction rates, no API surcharge, and revenue sharing opportunity, your business is poised to gain a profitable new recurring revenue stream. Summary SDKs (4) How To (0) Sample Source Code (1) Libraries (0) Developers (0) Followers (36) Changelog (5) Summary SDKs Articles How To Sample Source Code Libraries Developers Followers Changelog Comments (4) Comment * Leave this field blank Post Comment Luke Amoresano (not verified) 12:22 PM Dec. 20 2008 reply Nobody seems to have any integration that works perfectly, even though this gateway is awesome. Where have all the programmers gone? If a programmer makes a plugin, extension or a basic cart for paysimple that works - they'll make a small fortune. realtybaron 8:22 AM Oct. 23 2010 reply I developed a Java client for the PaySimple API. Contact me if interested. AdrianaCory 9:48 AM Jan. 14 2011 reply there is a C# client here : https://sandbox-api.paysimple.com/3.00/help/default.html realtybaron 8:22 AM Oct. 23 2010 reply I developed a Java client for the PaySimple API. Contact me if interested.