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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
TranslatedWeChat development Java SDK, supporting back-end development for WeChat Pay, Open Platform, Mini Programs, WeCom (Enterprise WeChat), Channels (video accounts), Official Accounts, and more
Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.
Lightweight In App Purchases Swift framework for iOS 8.0+, tvOS 9.0+ and macOS 10.10+ ⛺
Open-Source Subscription Billing & Payments Platform
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.
Payments for Ruby on Rails apps
PHP Payment processing library. It offers everything you need to work with payments: Credit card & offsite purchasing, subscriptions, payouts etc.
Java library for the Stripe API.
The JavaScript library for ExtensionPay.com — payments for your browser extensions, no server needed.
Golang client for PayPal REST API
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
Payum offers everything you need to work with payments. From simplest use cases to very advanced ones.
ACH implements a reader, writer, and validator for Automated Clearing House (ACH) files. The HTTP server is available in a Docker image and the Go package is available.
A complete payment library for Elixir and Phoenix Framework
SDK for growing mobile in-app purchases
Flutter Plugin for Square In-App Payments SDK
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 libGDX cross-platform API for InApp purchasing.
Build, Measure and Grow iOS subscription business
Pocketbase extention built in Go with stripe webhooks currently in use at sign365.com.au and fastpocket.dev
Stripe library for Vapor
Your friendly Bitcoin Lightning ⚡ payment page ⚡