x402 merchant
x402 Endpoint Preflight$0.003 / callemail-preflight-api.vercel.app
x402Payment-preflightPre-action-checkAgent-procurementAgent-safety

Pre-action check for AI agents: inspect an unfamiliar live x402 v2 challenge immediately before purchase. Verify price, network, payee, resource binding, timeout, and Bazaar metadata without paying the target or forwarding credentials. POST probes send only a fixed empty JSON object; callers cannot supply target request content.

MerchantReport

0x8331…064d

0x8331051bb822536d5e228433e7a5486f7169064dExplorer
Received
$0.006
Last 7d vs prior 7d
Paid out
$0.00
Last 7d vs prior 7d
Settlements
2
Last 7d vs prior 7d
2
Distinct counterparties
Over the whole indexed history

Received $0.006 of the $258.56M Roundhouse has indexed across 713,267 walletsless than 0.0001% of it.

Chains (from the recent scan): Base (2)

Funds flow over time

Activity

MarAprMayJunJulAugSep
LessMore

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

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0xc533…2d7a$0.00$0.003124d agoGraph
0xd72b…30e4$0.00$0.003154d 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 2 observed settlements.

Recent activity

Payer PayeeChainAmountx402RouteAgeTxn hash
0xc533…2d7a0x8331…064dBase$0.003100%coinbase24d ago0xfe9d73…2c3a9f
0xd72b…30e40x8331…064dBase$0.003100%coinbase54d ago0xdd153c…474246

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x8331…064d's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x8331051bb822536d5e228433e7a5486f7169064d

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: 0x8331051bb822536d5e228433e7a5486f7169064d

curl -s 'https://api.roundhouseai.io/v0/merchants/0x8331051bb822536d5e228433e7a5486f7169064d'
curl -s 'https://api.roundhouseai.io/v0/entities/0x8331051bb822536d5e228433e7a5486f7169064d/settlements?limit=50'

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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