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.
a2a-x402 is a widely-adopted Python project in the AI payments / x402 ecosystem, focused on a2a, a2a-protocol, agentic-ai, agents. It currently has 526 GitHub stars and 134 forks, and sits alongside related tools like x402, lucid-agents, summoner-agents.
💸 Simplify payments with x402, an open protocol for fast, fee-free digital dollar transactions. Experience seamless integration and instant settlements.
Lucid Agents Commerce SDK. Bootstrap AI agents in 60 seconds that can pay, sell, and participate in agentic commerce supply chains. Our protocol agnostic SDK provides CLI-generated templates and drop-in adapters for Hono, Express, Next.js, and TanStack, giving you instant access to crypto/fiat payment rails (AP2, A2A, x402, ERC8004).
A collection of Summoner clients and agents featuring example implementations and reusable templates