base/commerce-payments

Open-source Stellar and Soroban API for peer-to-peer USDC settlement, wallet authentication, orders, and escrow coordination.

The A2A x402 Extension brings cryptocurrency payments to the Agent-to-Agent (A2A) protocol, enabling agents to monetize their services through on-chain payments. This extension revives the spirit of HTTP 402 "Payment Required" for the decentralized agent ecosystem.

Open-source Stripe alternative for stablecoins. Checkout, subscriptions, and marketplace payouts. Stripe-compatible API. Your very own payments stack with no fees.

Specification and documentation for the Universal Commerce Protocol (UCP)

On-chain crypto payment platform for individuals and businesses.

Building a Secure and Interoperable Future for AI-Driven Payments.

A JavaScript library for interacting with the Request Network protocol

The Agent Commerce Kit (ACK)

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.