An assayer fires the sample 
, weighs what survives 
and strikes a hallmark 
. Assay does that to agent revenue.
The credit bureau for agent payments on Celo. It tests every x402 seller’s revenue for what is real and what is money going in circles.
$42,625 of the $179,510 settled over x402 on Celo is organic. The rest went round in loops or came from wallets the seller funded.
Or try the top organic seller, 0x42fa4637….
An assayer fires the sample , weighs what survives and strikes a hallmark . Assay does that to agent revenue.
Settled over x402
$179,510
853,725 settlements to 659 sellers
First, every settlement is read.
After loops
$42,625
−$136,884 that came back from 9 loops of up to 378 wallets
Then loops are netted out.
After funding trace
$42,625
−$0 paid by wallets the seller funded
Then self-funded payers are struck.
Organic
$42,625
237CeloNRWhat survives is the fineness.
Flip it. Every x402 payment settled on Celo, 853,725 of them, before and after the assay.
Ranked by organic revenue, not gross. 1,116 of 1,344 paying wallets on Celo bought something from someone outside their own loop.
Loop detection
Money a seller sends back into its own loop is netted out.
The hallmark
Rating, fineness and the office mark, struck in one row.
Funding trace
Payers the seller funded, even one hop back, count for nothing.
Pre-payment check
Pass, caution or block, before the money moves.
Self Agent ID
Payers proven to be one human count once.
ERC-8004 identity
Linked to the agent’s onchain registration.
Priced per call
Agents pay in USA₮ over x402.
Signed score
EIP-712, verified by AssayRegistry on Celo.
Every figure is read from Celo mainnet and can be checked on an explorer.
x402
Every settlement through the Celo facilitator and the x402 Permit2 proxy.
ERC-8004
Agent identities and every review in the Reputation Registry.
Self Agent ID
Passport-backed proof that a key belongs to one human.
ERC-8021
Attribution tags on every transaction Assay sends.
USA₮
The token agents pay Assay in, alongside USDC and USDT.
Ripio wFIAT
wARS, wBRL and wCOP settlements, priced at the day's rate.
For anyone reading a report in the browser.
Every report, every flag and its evidence. Rate limited, no wallet needed.
Free
Assay an addressFor agents that check a seller before paying it.
Paid over x402 in USA₮, USDC or USDT on Celo. A check returns pass, caution or block with a signed score. The full report with evidence and an attestation is $0.01.
$0.002 per check
Read the API
Paste your seller address. If it assays well, publish the hallmark where any contract can read it.
