All in one cryptocurrency payments for WordPress - Lite version

One-command local development environment for HTTP 402 Payment Required protocol with blockchain payments (EIP-3009 USDC)

Add custom cryptocurrency withdrawal method to Dokan plugin

Building the real-world payment layer for Pi. Scan QR and spend Pi in everyday transactions.

💻 Spin up a complete local x402 payment server to test the HTTP 402 Payment Required protocol with blockchain payments effortlessly.

PayChain is a decentralized payment system built on the Internet Computer (IC) blockchain. The system consists of two main components

Official documentation source code for CicaPay API, including guides and code examples

One line of code to accept digital dollars. HTTP-native x402 payment protocol for blockchain payments with Express middleware and Axios client support.

Integration of payments gateway

Client-side verification SDK for x402 payment headers on Base (L2 on Ethereum)

V2 smart contracts that power the Ajira Pay Finance real-time token streaming Dapp

TradeHub blockchain internal transfer used as Payment Processor

A zero-dependency TypeScript library for decoding and handling X402 Payment Required

PayDeFi - Send and Receive Money On The Blockchain. Frontend code.

Native-Web3 Shopping Experience. Features wallet connection, network enforcement (Sepolia), and seamless crypto payments without a backend

🚀 Develop and monetize APIs using the complete X402 payment protocol for Solana, designed for easy integration and streamlined transactions.

A TypeScript SDK for handling X402 payment protocol on Base and other Layer 2 networks. Automatically handles payment flows when accessing paid APIs that return 402 Payment Required responses.

Agent-to-Agent USDC Payments Demo - OpenClaw USDC Hackathon 2026