x402 merchant
x402 Merchant Audit$0.01 / callmerchant-audit.clankerceo.workers.dev
x402Due-diligenceTrustSafetySecurity

Is this API safe to pay? Audit any x402 merchant or paid endpoint BEFORE you send money. Answers whether a service is trustworthy, whether it is a scam or dead, and whether it will actually deliver. Probes the live endpoint for a valid HTTP 402 challenge, detects price drift between the advertised price and the real challenge price, pulls settlement history and unique-buyer counts, and verifies on-chain USDC actually reaching the payTo address. Returns a PASS / CAUTION / AVOID verdict with the evidence behind it. Every check is measured live at request time — nothing cached, no reputation scores. Use before paying an unknown merchant, to avoid wasting money on dead or fraudulent endpoints.

MerchantReport

0xca03…34a3

0xca03fb4b1d2f66f5a83a5ca91021b874ac4a34a3Explorer
$0.00
Inbound volume
0
Settlements
6
Distinct counterparties

Chains: Base (10)

Activity

MarAprMayJunJulAug
LessMore

One square per day; click a day to see its settlements in the ledger.

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0x9f8b…73a2$0.02$0.00222h agoGraph
0x6ee4…9427$0.02$0.00222h agoGraph
0x52e2…f3ea$0.02$0.00222h agoGraph
0xab67…54ca$0.02$0.00222h agoGraph
0x058d…21b2$0.01$0.00122h agoGraph
0xc91c…b95c$0.01$0.00122h agoGraph

Ranked by settled amount over this wallet's recent settlement window — who it normally transacts with.

Data quality

No concentration or self-dealing patterns detected in observed activity.

Recent activity

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0xca03…34a3's payment record before paying it over the free read API. No key, no account.

GET www.roundhouse.studio/api/v0/merchants/0xca03fb4b1d2f66f5a83a5ca91021b874ac4a34a3

Open skill.md
Show the prompt
Using Roundhouse, tell me whether this x402 merchant is worth paying: how many distinct
agents have paid it, how recently, and for what.

  Merchant wallet: 0xca03fb4b1d2f66f5a83a5ca91021b874ac4a34a3

curl -s 'https://www.roundhouse.studio/api/v0/merchants/0xca03fb4b1d2f66f5a83a5ca91021b874ac4a34a3'
curl -s 'https://www.roundhouse.studio/api/v0/entities/0xca03fb4b1d2f66f5a83a5ca91021b874ac4a34a3/settlements?limit=50'

If you do not have Roundhouse tools or skills installed, read
https://www.roundhouse.studio/skill.md first — it is the whole procedure, and it needs no key.