The Payments API file handles creating and processing payments, including card authorization, fraud checks, and settlements

CIC Payment is a gem to ease credit card payment with the CIC / Credit Mutuel banks system. It's a Ruby on Rails port of the connexion kits published by the bank.

Rails Payment Sandbox helps developers test payment flows locally without hitting real gateways. It simulates Stripe, Razorpay, PayPal, and provides fake transactions with random statuses.

This gem generates UPI QR codes for payments. It can be used in e-commerce applications to generate QR codes for payments. The QR codes can be scanned by UPI apps to make payments. The gem uses the rqrcode gem to generate the QR codes.

The gem abstracts away the low-level details of the API, providing a simple and intuitive interface for sending payment requests, checking payment status, and managing payment callbacks

Authorize.Net SDK includes standard payments, recurring billing, and customer profiles

Implemention of Payments Initiation (ISO 20022)

A library to interface with Fawry's payment gateway API (charge, refund, payment status, service callback).

Robokassa is payment system, that provides a single simple interface for payment systems popular in Russia. If you have customers in Russia you can use the gem. The first thing about this gem, is that it was oribinally designed for spree commerce. So keep it in mind.

Ruby client library for the GMO Payment Platform.

Lightweight wrapper for Paypal's Adaptive Payments API

Client for ReCharge Payments recurring payments API for Shopify

Instamojo Ruby library - Assists you to programmatically create, edit and delete offers on Instamojo. Also supports listing, updation and details of Payments, Payments Requests and Refunds.

Integration with polish payment method: Przelewy24

acts_as_payment is a rails plugin that enables you to work with bills.

A rails plugin to add an active_merchant patch for china online payment platform

Skrill payments

Accept Mobile money, cards, crypto, invoices, QR codes, and more with Sunny Payments.

Generate loan amortization schedules with monthly, bi-weekly, weekly, or daily payments. Supports grace periods, interest-only payments, federal bank holidays, and multiple interest calculation methods.

Enable spree store to allow payment via PAGA Gateway (an online payment solution for Africa).