What is a good third party transaction API platform to use for ROR?

I have been lo开发者_JS百科oking at paypal for a online transaction, but I wanted to know if there are other 3rd party vendor that offer a good service at a good price ( transaction fee) and ease of use of API for ruby on rails application.

Check out Braintree. There's a Braintree Ruby gem that makes integration easy, and pricing is very competitive. And you don't have to fear "the paypal call".

Authorize.net has a better pricing plan that PayFloPro by Paypal, with very similar functionality.