Shared foundation for building x402-compatible systems
x402-commons is an early-stage Java project in the AI payments / x402 ecosystem, focused on cryptocurrency, java, stablecoin, x402. It currently has 2 GitHub stars and 2 forks, and sits alongside related tools like sperax-crypto-mcp, x402-stablecoin, x402-spring-boot-starter, sample-agentic-serverless-payments, x402-facilitator, x402-examples.
Website • Documentation • Examples • Twitter
It provides all core classes, enums, constants, and API definitions required to implement the x402 protocol.
MCP server and plugin for Sperax Protocol – USDs, SPA, veSPA & Demeter on Arbitrum and BNB Chain. Listed on Anthropic's official MCP Registry.
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.
Protect your APIs with pay-per-call logic using a single Spring Boot annotation.
An open-source, serverless reference implementation for agentic commerce: pay-per-use generative AI, physical goods, and digital goods, where embedded wallets and autonomous AI agents settle USDC stablecoin micropayments over the x402 protocol using Amazon Bedrock AgentCore payments on AWS
Run your own payment gateway as a Docker image, or use ours online to verify and settle x402 transactions instantly.
Learn x402 through real-world demos of paywalled endpoints and instant payment flows.
The agent-native LLM router for autonomous agents. 55+ models (8 free), <1ms local routing, USDC payments on Base & Solana via x402.
The AI agent with a wallet — spends USDC autonomously to get real work done. Apache-2.0, TypeScript.
The first agentic payment network: policy-controlled, gasless, and real money-ready. OmniClaw CLI + Financial Policy Engine let autonomous agents pay and earn safely at machine speed.
An open SDK for agentic payments. Let AI agents make payments, hold funds, and move money across chains with policy enforcement and human approval built in.
x402 Ecosystem Explorer
🚀 Curated list of x402 resources: HTTP 402 Payment Required protocol for blockchain payments, crypto micropayments, AI agents, API monetization. Includes SDKs (TypeScript, Python, Rust), examples, facilitators (Coinbase, Cloudflare), MCP integration, tutorials. Accept USDC payments with one line of code. Perfect for AI agent economy.