{"repo":"Sperax/x402-stablecoin","free":true,"listed":false,"github":"https://github.com/Sperax/x402-stablecoin","clone":"git clone https://github.com/Sperax/x402-stablecoin.git","description":"x402 payment protocol enabling AI agents to autonomously pay for APIs on Arbitrum. Features Sperax USDs stablecoin with auto-yield, payment channels for streaming micropayments, on-chain subscriptions, and a tool registry marketplace. Includes TypeScript SDK, Express middleware, and upgradeable smart contracts.","language":"TypeScript","stars":12,"topics":["agent","crypto","cryptocurrency","decentralized","defi","mcp","sperax","stablecoin","usds","x402"],"license":"Apache-2.0","category":"blockchain-web3","readme_excerpt":"X402 Payment Protocol with Sperax USDs Revolutionary AI Agent Payment Infrastructure — HTTP 402 payments with yield-bearing USDs stablecoin on Arbitrum 🌟 Overview X402 is a complete payment protocol implementation for AI agents, combining: - HTTP 402 - Payment Required standard for programmatic payments - Sperax USDs - Auto-yield stablecoin (8-25% APY) on Arbitrum - EIP-3009 - Gasless transfer authorization - Arbitrum L2 - Low-cost, fast transactions 💡 Why X402 + USDs? Feature Traditional Payments X402 + USDs --------- --------------------- ------------- Fees 2-3% + fixed $0.001 gas Settlement Days Seconds Yield 0% 8-25% APY AI Native ❌ ✅ Gasless ❌ ✅ (EIP-3009) Micropayments ❌ ✅ 📦 Packages Package Description --------- ------------- @x402/sdk Core SDK for X402 payments @x402/cli Command-line interface @x402/sperax-mcp MCP tools for AI agents facilitator Payment verification server yield-tracker USDs yield monitoring contracts Solidity smart contracts 🚀 Quick Start 💰 Make a Payment Using the SDK Using MCP Tools (AI Agents) 📈 Earn Yield on Payments Received USDs automatically earns yield while sitting in your wallet: 🔧 Architecture 🎯 Use Cases 1. AI Agent Tool Marketplace Pay per API call with micropayments. No subscriptions, no minimums. 2. Content Monetization Paywall articles, videos, or data with instant USDs payments. 3. Revenue Splitting Automatic 80/20 split between developers and platforms. 4. Subscription Streaming Pay-as-you-go subscriptions that auto-renew wi","default_branch":null,"files":null,"tree":[],"storefront":"/r/Sperax","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/Sperax/x402-stablecoin/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}