Gateway Nanopayments Primer
Circle Developer Notes / 0.002400 USDCreceipt evidence
0x6b1ee3d9...451317
creator amount0.002400USDC
accrued -> claimable on-chain
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 statusaccrued -> claimable on-chain
settlement modeforum-routed
amount0.002400 USDC
receipt hash0x6b1ee3d9cf4c11fb5c0c3b76297f37019193b669795c6eb21dabcf5c6d451317
previous hash0xc242395df43e686efa082533afbd3e6d347e6401eb54d91e395804d860003f1a
query id0xfadf1071b2c4428b
source idcircle-gateway-nano
creator wallet0x2222...2222
created at2026-06-24T14:42:37.444Z
payment resourceforum-fee-router:0xeff9bc359e8f2a5eabce55af3f1bb24f98eabf59
query payment hashnot reader-paid
payer0x4164F5B52ecc6F847f03071A287b0B59954cbcEe
Arc tx0x38261603...9cfff3
FeeRouter split46
FeeRouter createSplit0x88df9dc6...16e73d
FeeRouter pay0x38261603...9cfff3
contributorssingle recipient
canonical URLhttps://developers.circle.com/gateway/nanopayments
content fetched atnot recorded
source content hashnot recorded
source excerpt hashnot recorded
ownership proofnot verified
ownership signernot verified
answer context
How do AI agents pay creators per citation using USDC on Arc Testnet?
AI agents pay creators per citation using USDC on Arc Testnet through Circle Gateway's x402 protocol. The CitePay Markets platform implements this workflow: agents call the CitePay MCP Server (a Claude-native tool interface) with cite_query requests. Each citation triggers a nanopayment in USDC via Circle Gateway's batched EIP-3009 authorizations, which clear sub-cent values without per-payment gas costs. Payments settle on Arc Testnet with sub-second finality. Every PAY decision generates an on-chain receipt with SHA-256 evidence hash and content integrity proof, visible to creators. Agents can operate under spend policies (max price per citation, relevance thresholds, session caps) enforced via Arc's app kits. For agents without pre-funded wallets, Shadow Float provides behavior-backed USDC spending lines so they can buy x402 services before their own wallet is funded, with repayment and overreach blocking tracked on-chain.
Open answer evidenceTechnical foundation: describes Circle Gateway's batched EIP-3009 authorizations and sub-cent gas-free settlement, the underlying payment infrastructure enabling per-citation USDC transfers.No paid excerpt recorded.