AI RESEARCH
Hardening x402: PII-Safe Agentic Payments via Pre-Execution Metadata Filtering
arXiv CS.AI
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ArXi:2604.11430v1 Announce Type: cross AI agents that pay for resources via the x402 protocol embed payment metadata - resource URLs, descriptions, and reason strings - in every HTTP payment request. This metadata is transmitted to the payment server and to the centralised facilitator API before any on-chain settlement occurs; neither party is typically bound by a data processing agreement.