juspay / hyperswitch
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
btcpayserver / btcpayserver
Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.
juspay / hyperswitch-prism
One library | Many payment processors | Scale to multiple processors with few lines of code.
DigitalShieldOfficial / USDT-Payment-Gateway
A lightweight USDT/USDC payment gateway with multi-chain support, integration guides, SDK documentation, and merchant demos.轻量级 USDT/USDC 支付网关，提供多链支持、接入指南、SDK 文档和商户演示程序。
bitcart / bitcart
Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more
shetabit / payment
simple laravel payment package , supports multiple drivers
xiaodou-official / xiaodou-open-platform
个人支付接口｜个人网站/个人开发者/个人用户接入支付宝+微信聚合支付接口 API：个人/小微无需营业执照，卡密/虚拟商品收款，持牌清算、次日中午前到账（含节假日），兼容易支付。Alipay/WeChat Pay API for individual developers in China; Epay-compatible; licensed settlement.
Goncafer47 / Stablecoin-Payment-Gateway
Self-hosted, non-custodial stablecoin payment gateway with x402 and invoice checkout. Accepts USDC, USDT, PYUSD and DAI across 8 networks with QR payments, payment links, settlement tracking and signed webhooks. REST API, micropayments, exports, zero platform fees and no KYC. Python, cross-platform.
paid-tw / payment
台灣金流 SDK：一致的 PaymentProvider 介面，方便串接。支援 PAYUNi、藍新 NewebPay、綠界 ECPay（AIO + 站內付 2.0）。
kungec / kunpay
坤支付 KunPay — 开源个人免签约码支付系统 | Go 单文件 · 易支付兼容 · 多码轮询 · 云端挂机 · 安卓监控APP 扫码配对 | 赞助: KJ VPS (kjvps.com)
ahmadzakiyox / orderkouta-api-gateaway
Server Gateway REST API Node.js Khusus Orderkuota Engine & Pengecekan Mutasi Otomatis QRIS Real-time.
alhifnywahid / merchantid
Unofficial zero-dependency TypeScript toolkit for Indonesian merchants: turns a static QRIS into unique per-order dynamic QRIS and reconciles settlement from GoPay (GoBiz) and ShopeePay merchant transaction feeds.
imehdiha / cardpay
Self-hosted card-to-card payment gateway for PHP and MySQL with HMAC API, SMS matching, webhooks, and a Persian RTL payment UI.
RojanSapkota / esewa-payment-gateway
A self-hosted eSewa payment gateway bridge with dynamic QR code generation, universal Nepali bank support and automated instant verification. Zero-fees and no PAN/VAT required.