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Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation
Polar — A billing platform for the intelligence era
The user infrastructure platform. You choose the frontend, backend, and database. Hexclave handles everything else.
Open-Source Subscription Billing & Payments Platform
TranslatedPossibly the most elegant payment SDK extension package for Alipay/WeChat/Douyin/Unipay/江苏银行 (Bank of Jiangsu) that I have ever used
Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
A self-hosted UPI & COD payment gateway with zero per-transaction platform fees, universal JavaScript checkout integration, dynamic QR payments, WhatsApp OTP authentication, and automated payment verification.
PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.
The JavaScript library for ExtensionPay.com — payments for your browser extensions, no server needed.
SDK for growing mobile in-app purchases
Lightweight Bitcoin payment processor written in easily deployable Python. Self custody donations and payments on-chain & Lightning network, directly connected to your own Bitcoin node! No middleman/custodian.
💸 Crypto Payments straight to your wallet. DePay simplifies Web3 integration for developers, harnessing DeFi to accept any token effortlessly. Integrate frictionless, real-time token conversion with sleek, customizable widgets designed for seamless user experience.
Frames iOS: making native card payments simple
ColdFusion payment processing library makes plumbing e-commerce apps easy. Charging credit cards has never been easier. Inspired by Ruby's ActiveMerchant.
Flare is a lightweight, developer-friendly Swift framework that simplifies working with in-app purchases. It provides a clean, unified API over StoreKit and StoreKit 2, includes async/await-ready workflows, and offers built-in UI components for a seamless integration experience.
Support for In-App Purchase
A small repo to help SaaS devs build a LemonSqueezy integration with Pocketbase
:money_with_wings: PayPal REST API client for the Elixir language (elixir-lang)
A Raspberry Pi 3 based payment module based on RFID.
PAYONE Payment Extension for Magento 2
Pay is an Elixir Lib to deal with Paypal and other payment solutions.
Support for In-App Purchase
The PayPal Server SDK provides integration access to the PayPal REST APIs.
A comprehensive, zero-dependency Go SDK for the Paystack API