A Spree 5.6+ payment method for PayPal Checkout. Creates and captures PayPal Orders via payment sessions, pins the storefront address, and records PayPal wallet, Apple Pay, and card sources.

Adds a bank transfer payment method to Spree with an optional discount, unique payment references, automatic reconciliation of incoming transfers, and an admin queue for payments that cannot be matched automatically.

PaymentKit is a Ruby SDK for authenticating to and calling the PaymentKit API.

Server-side Wajub payments, webhooks, and merchant API client.

Surface Mambu Payments connected accounts, payment orders, transactions and balances as Forest Admin collections.

Ruby client for the dpay.pl payments API: payments, refunds, banks, BLIK, cards and payouts.

Mountable rails engine which loads assets (svg files of payment icons) and provides a frozen_record model called PaymentIcon to access these through groups, names of icons, etc.

An expressive, framework-agnostic Ruby client for the Bayarcash Payment Gateway API. Supports API v2 (default) and v3, checksum generation, callback verification, FPX Direct Debit, and Manual Bank Transfer.

Hash generation, payment initiation params, server-to-server verification, and refund support for PayU India. Framework-agnostic — works with Rails, Sinatra, or plain Ruby.

Ruby SDK for VirtualSMS — SMS verification using real physical SIM cards in European and US mobile networks. Supports WhatsApp, Telegram, Google and 700+ services. Near-100% delivery rates. Crypto payments. API compatible with sms-activate protocol.

Loan Payment Calculator is a simple tool for calculating loan payments. It returns the monthly payment, total interest, and more.

trade, payment

Ruby library to access the Dodo Payments API

Lightweight gem to build UPI deep links, validate VPAs, and generate QR codes — no payment gateway, no merchant account, just link generation for direct P2P-style UPI collection.

Official GriffNode SDK. Non-custodial crypto payment gateway: accept BTC, ETH, LTC, DOGE, DASH and ERC-20 tokens straight to your own wallet.

An unofficial Ruby client library for Airwallex payment, payout, and treasury APIs.

Ruby SDK for the Machine Payments Protocol (MPP) — an HTTP 402 Payment Authentication scheme.

A Ruby SDK for the SmartBill Cloud REST API, offering a synchronous client with typed request/response models for invoices, proformas, payments, e-mail, taxes, series and stocks.

A Solidus extension that lets your store accept payments through Mollie using their hosted (redirect) checkout and webhooks.

Zero-dependency Net::HTTP client for SDP's wallets, payments, token-issuance, and ramp APIs: typed errors, envelope unwrapping, and a safe retry posture.