x402 merchant
Blackwood State Email Batch$0.02 / callx402-gateway.blackwoodstate8.workers.dev ↗
Bulk email validationEmail list verificationVerify emailData

Use when you need bulk email validation, email list verification or to verify email lists before a send or import. Do not use for one address (email-check is cheaper), proving a mailbox exists (no SMTP probe) or sending email. Returns JSON checking up to 20 email addresses in one call: syntax, MX records, disposable, free and role flags, SPF, DMARC and a verdict each, plus counts by verdict for 0.02 USDC per call. Typical response time 2500 ms (p95). Category: Data.

MerchantReport

0x2745…528c

0x274508f17cdb74bbbe4241f3ca618709d0a5528cExplorer
Received
$0.10↓ 75%
Last 7d vs prior 7d
Paid out
$0.00
Last 7d vs prior 7d
Settlements
5↓ 75%
Last 7d vs prior 7d
2
Distinct counterparties
Over the whole indexed history

Received $0.10 of the $846.70M Roundhouse has indexed across 1,330,126 wallets — less than 0.0001% of it.

Chains (from the recent scan): Base (5)

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
0x87db…f8cf$0.00$0.0846h agoGraph
0xa1d1…1978$0.00$0.0217d agoGraph

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

Data quality

80% of observed volume is with a single counterparty, in all 5 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 0x2745…528c's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x274508f17cdb74bbbe4241f3ca618709d0a5528c

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: 0x274508f17cdb74bbbe4241f3ca618709d0a5528c

curl -s 'https://api.roundhouseai.io/v0/merchants/0x274508f17cdb74bbbe4241f3ca618709d0a5528c'
curl -s 'https://api.roundhouseai.io/v0/entities/0x274508f17cdb74bbbe4241f3ca618709d0a5528c/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.