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
$0.08
Received
$0.00
Paid out
4
Settlements
2
Distinct counterparties
In the 4 settlements scanned

Received $0.08 of the $833.87M Roundhouse has indexed across 1,300,188 wallets — less than 0.0001% of it.

Counted from this wallet’s own settlements. The index rollup has no row for it yet, which is normal for an address first seen in the last half hour.

Chains (from the recent scan): Base (4)

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0x87db…f8cf$0.00$0.06317h agoGraph
0xa1d1…1978$0.00$0.02145m agoGraph

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

Data quality

75% of observed volume is with a single counterparty, in all 4 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.