Merchant signature calculator for Adyen (https://www.adyen.com) payments service. It is implementation of HPP HMAC (SHA-256) algorithm from Adyen documentation (https://docs.adyen.com/display/TD/HPP+HMAC+calculation).

Payment gateway for USA ePay transaction

SlidePay makes it ridiculously easy to take swiped payments anywhere, on any device. Check out http://www.slidepay.com for more info.

simple gem for payanyway payment gateway

Defines ruby classes for the Splash Payments API

Alpha Card Payment Gateway for Spree

Leverages the invoicing API in order to seamlessly accept bitcoin denominated payments

This extension adds Cash on delivery payment method to Spree

== DESCRIPTION: Experimental library for working with GoogleCheckout. Currently in use for payment at http://peepcode.com.

Requires Ruby 2.1 and up. Not all API actions are supported. Find out more in the readme todo section.

A gem to implement Telipass micropayment notifications for basic payments

This API supports all services required to make cross border payments using Earthport's network.

Module for Paypal payment functionality in the Trado Ecommerce platform.

This gem allows you to interface with 2c2p payment gateway

This Ruby Gem is the official reference client for the wcx.io payments API. To use this, you will need the cryptocurrency API key from wcx.io. Go ahead, sign up :)

Implements the Wirecard API for payment services. Currently supports only seamless mode.