x402r Refund Protocol
Refund & Arbitration Protocol For Agents
What it does
x402r is the refund extension for the x402 payment protocol. Enable secure, transparent, and automated refund processing for internet-native payments with escrow protection. We’ve been building for three months and won an Ethereum Foundation and Coinbase hackathon with it. After communicating with many teams, we just finished building the v2 of the protocol and wanted to share it with the broader tech community on ProductHunt!
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- XAX402 – an open standard for internet native payments2025 · x402.org · ▲16
Hi HN – excited to announce x402, initially developed by Coinbase (YC 12) x402 lets any HTTP API charge per request without issuing API keys or storing credit cards. Buyers (humans or AI agents) keep funds in their own wallet and dynamically discover compatible endpoints, call them as usual, and automatically pay a microtransaction in USDC or other tokens to settle. 90 second demo: https://www.youtube.com/watch?v=PV-L2AfLhJg Problem: Every time we want to use a new API we have to: find the service online create a developer account, copy a secret key into env vars, pre-fund or…
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