google-agentic-commerce/a2a-x402
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.
Implements a three-message payment flow (payment-required, payment-submitted, payment-completed) with cryptographic signing and on-chain settlement, using a functional core and executor middleware pattern for flexible integration. Targets the A2A protocol ecosystem with multi-language support and experimental payment scheme plugins, allowing agents to charge for services ranging from API calls to AI inference through standardized request-response flows.
472 stars.
Stars
472
Forks
106
Language
Python
License
Apache-2.0
Category
Last pushed
Feb 02, 2026
Commits (30d)
0
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