Gateway Nanopayments Primer
Circle Developer Notes / 0.002400 USDCreceipt evidence
0xd637636c...998292
creator amount0.002400USDC
refunded
Circle Developer Notes
This receipt binds a source payment to the answer that used it; FeeRouter-routed receipts accrue into creator-claimable balances. The previous hash links it into the append-only attribution ledger.
payment statusrefunded
settlement moderefunded
amount0.002400 USDC
receipt hash0xd637636c920403f4d36f4ab3df2cbd24ec03b0c2b49fa0a595ec537474998292
previous hash0x0f6da8a9cdea5927a01fda2905164622a70654c9a4e78ae01edf740e6c86733d
query id0xd539ac919cdce1fa
source idcircle-gateway-nano
creator wallet0x2222...2222
created at2026-07-06T14:58:56.402Z
payment resourcetollgate-refund:unused-source
query payment hashnot reader-paid
payerlocal proof
Arc txpending settlement
FeeRouter splitnot FeeRouter-routed
FeeRouter createSplitnot FeeRouter-routed
FeeRouter paynot FeeRouter-routed
contributorssingle recipient
canonical URLhttps://developers.circle.com/gateway/nanopayments
content fetched at2026-07-06T14:58:56.402Z
source content hash0xcd4bc1f183935e9f1271741d0471bdcf6bc666f53540366b24d793038f2c0457
source excerpt hash0x040ead003a061a3df77b69f1231ee277069666b951ead02b685c8626bd888d00
ownership proofseed-demo
ownership signernot verified
answer context
How do agent payments work with x402 on Arc?
Agent payments with x402 on Arc work through two settlement schemes. In the 'exact' scheme, a resource returns payment requirements, the client signs an EIP-3009 USDC authorization, and the server settles it directly on Arc as a single USDC transfer, making the reader's debit a verifiable on-chain transaction. Alternatively, the Circle Gateway-batched scheme pools many signed authorizations for gasless sub-cent settlement, referenced by a Gateway payment id rather than individual Arc transactions. For multi-contributor works, the FeeRouter contract can route USDC through an on-chain split keyed to creator wallets with basis-point shares. Sub-cent citations accrue to a claimable FeeRouter balance that creators withdraw with a single claim call to avoid per-citation gas costs.
Open answer evidenceCovers Circle Gateway batching of EIP-3009 authorizations for gasless x402 sub-cent settlement, a key mechanism for agent payments at scale on Arc.Seed/demo content from Circle Developer Notes. Title: Gateway Nanopayments Primer. Excerpt: Circle Gateway batches signed EIP-3009 authorizations so x402 payments can clear at sub-cent values without per-payment gas. Tags: circle, gateway, eip-3009, x402, usdc. Canonical URL: https://developers.circle.com/gateway/nanopayments.