75.4M x402 transactions over the last 30 days produced only $24.2M of volume, so agent payments look more like API-metering spam than payroll-sized remittances. That favors USDC-style EIP-3009 auth on Base/Arbitrum/Solana and policy wrappers over vanilla card rails, but it also makes replay/context-binding bugs a P0 once an LLM can spend from a wallet. With ~$314B of USD stablecoin float already live, enterprise CX agents do not need a new monetary asset; they need hard limits, settlement receipts, and compliance hooks that survive millions of tiny autonomous calls.

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