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Independent MeasurementUSDCLedger read
vet402Measured chains2026-10-26

x402 payments on Solana (USDC)

vet402 measures x402 payments on Solana.

The pinned settlement asset on Solana is USDC.

1.This read

Delivered counts settled purchases whose paid request answered 2xx. The row is l1.byChain for Solana. CAIP-2 solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp.

Paid attempts
1,067
Settled
789
Delivered
748

41 settled purchases on this chain are held as inconclusive. The methodology says why a 4xx is held.

2.How a purchase is tied to its settlement

CAIP-2 solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp. The purchase is tied to its settlement by a memo written on the transaction. The re-read matches that memo.

3.Where to read on

/api/v1/observatory/state (CC BY 4.0) is the source. Definitions are in the methodology. How an agent pays, including USDC, is How AI agents pay with stablecoins. How to check a seller before paying is on its own page. A longer note on the protocol is What is x402.