SystemPay is a gem to ease credit card payment with Natixis Paiements / CyberplusPaiement bank system. It's a Ruby on Rails port of the connexion kits published by the bank.

Wrapper around the Paypal Adaptive Payments API

WebPay is payment gateway service in Japan. See also https://webpay.jp/.

Simple REST API for the CyberSource Global Payments Platform

This gem implements the REST API of the Sisow payment provider.

A ruby gem for integration of your backend with the payment services provided by Efí Pay

Easier Rabobank OmniKassa payments

An engine for the Straight payment gateway software. Requires no state to be saved (that is, no storage or DB). Its responsibilities only include processing data coming from an actual gateway.

Simple rails engine to add payments to your web application using sermepa standard web tpv

An API for using the Amazon Flexible Payment Service (FPS).

Adds Purchase Order as a Payment Method to Spree Commerce

Helping rubyist integration with cmb (China Merchants Bank) payment service (招商银行一网通支付) easier.

Paysera.com payment API

Stripe Payments Integration with Catarse crowdfunding platform.

Allows easy calculation of revenue sharing by app and in-app purchases. Munges the monthly CSV reports from Google Play or Amazon Android app stores. Does Amazon currency conversions and verifies against payment amounts.

Adyen HPP payments for Solidus Stores

Gem using curl to post to Venmo payment gateway

Payment Method for USA ePay SOAP Webservice

PingPlusPlus is the easiest way to accept payments online. See https://pingxx.com for details.

[Deprecated] The PayPal Adaptive Accounts SDK provides Ruby APIs to create and manage PayPal accounts, add payment methods to accounts and obtain account verification status using the PayPal Adaptive Accounts API. It is recommended to use paypal-server-sdk instead