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Every x402 / EIP-3009 settlement on Base USDC — counted, sized, and attributed.
When AI agents pay each other, this is where the receipts land. Indexed on-chain, updated every minute, history starts at launch day (2026-10-31).
Method. A settlement is an
AuthorizationUsed event emitted by the Base USDC contract
(
0x8335…2913) — the authoritative mark of an EIP-3009
transferWithAuthorization /
receiveWithAuthorization execution.
Value and counterparties are paired from the
Transfer event in the same transaction.
Coverage. v0.1 indexes Base only. x402 activity also exists on Solana and other chains — not yet counted here,
so treat these figures as a Base floor, not a market total.
Data: stats.json · built by
PayCensus Labs