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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
Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.
A framework agnostic, multi-gateway payment processing library for PHP 5.6+
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.
Do design No code 💻📱🛒📚
TranslatedA lightweight USDT/USDC payment gateway with multi-chain support, integration guides, SDK documentation, and merchant demos.
Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more
SHKeeper is a self-hosted and open-source cryptocurrency gateway payment processor. It's integrate with popular CMS, any e-commerce, your own code or product
A complete payment library for Elixir and Phoenix Framework
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.
A payment processing library for Elixir
Thư viện .NET & Web API hiệu năng cao xử lý mã QR thanh toán VietQR chuẩn NAPAS247 & EMVCo. Hỗ trợ .NET 6/8/9/10, nhúng sẵn 76+ ngân hàng, render PNG/WebP/SVG.
Multi-merchant UPI payment gateway with dynamic QR, auto-verification & signed webhooks — Laravel 12
Adyen API Library for .NET
AI crypto trading bot with deep neural network (84.9% accuracy, 25 coins). BiLSTM + Attention trained on GPU. Bybit, Binance, OKX, Gate.io. Free cloud or self-hosted.
Cashier is an Elixir library that aims to be an easy to use payment gateway, whilst offering the fault tolerance and scalability benefits of being built on top of Erlang/OTP
A comprehensive, zero-dependency Go SDK for the Paystack API
Golang SDK for Dusupay payment gateway API (Unofficial)
Fasapay payment gateway XML API Client for Go (Unofficial)