x402 merchant
402api Seller Check$0.02 / calltokencheck.402api.dev ↗
x402Seller-reputationTrustProvider-selectionPre-payment-check

Call before paying an unfamiliar x402 endpoint, or to pick between providers. $0.02, usually <1 s plus one probe: live unpaid probe (status, latency, TLS, PAYMENT-REQUIRED decoded and sanity-checked), seller reputation from indexed on-chain USDC payments to its Base payTo (24 h/7 d count, distinct payers, total and median USD, top-payer share), Bazaar listing and price, and a looks legit/caution/avoid verdict citing each fact. Errors: 400/503 JSON {error}, not charged.

MerchantReport

0x8c8a…ffde

0x8c8a81e2acec6ed62421f1f4e7125b0b84ffffdeExplorer
Received
$0.16↓ 50%
Last 7d vs prior 7d
Paid out
$0.00
Last 7d vs prior 7d
Settlements
8↓ 50%
Last 7d vs prior 7d
4
Distinct counterparties
Over the whole indexed history

Received $0.16 of the $846.70M Roundhouse has indexed across 1,330,126 wallets — less than 0.0001% of it.

Chains (from the recent scan): Base (8)

Funds flow over time

Activity

MayJunJulAugSepOct
LessMore

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

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0xcb1d…057b$0.00$0.08416d agoGraph
0xa1d1…1978$0.00$0.0427d agoGraph
0x7722…5e4a$0.00$0.0212d agoGraph
0xc9c7…1670$0.00$0.02114d agoGraph

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

Data quality

50% of observed volume is with a single counterparty, in all 8 observed settlements.

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 0x8c8a…ffde's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x8c8a81e2acec6ed62421f1f4e7125b0b84ffffde

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: 0x8c8a81e2acec6ed62421f1f4e7125b0b84ffffde

curl -s 'https://api.roundhouseai.io/v0/merchants/0x8c8a81e2acec6ed62421f1f4e7125b0b84ffffde'
curl -s 'https://api.roundhouseai.io/v0/entities/0x8c8a81e2acec6ed62421f1f4e7125b0b84ffffde/settlements?limit=50'

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.