x402 merchant
Blackwood State Email Check$0.005 / callx402-gateway.blackwoodstate8.workers.dev ↗
Email validationVerify emailMx recordData

Use when you need email validation or to verify email addresses (domain, MX records) before sending, signup or lead scoring. Do not use for confirming that the mailbox itself exists (no SMTP probe is done) or sending email. Returns JSON with an email address check: syntax, domain and MX records, disposable, free and role account flags, SPF and DMARC, and a verdict on whether the domain can receive mail for 0.005 USDC per call. Typical response time 800 ms (p95). Category: Data.

MerchantReport

0x7f29…a758

0x7f299708d49cbaf60815ac52d0b7d645e158a758Explorer
$0.04
Received
$0.00
Paid out
7
Settlements
4
Distinct counterparties
In the 7 settlements scanned

Received $0.04 of the $833.89M Roundhouse has indexed across 1,300,243 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 (7)

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0x87db…f8cf$0.00$0.02418h agoGraph
0xc9c7…1670$0.00$0.00516h agoGraph
0xec2a…d034$0.00$0.00511d agoGraph
0xa1d1…1978$0.00$0.00511d agoGraph

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

Data quality

57% of observed volume is with a single counterparty, in all 7 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 0x7f29…a758's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x7f299708d49cbaf60815ac52d0b7d645e158a758

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: 0x7f299708d49cbaf60815ac52d0b7d645e158a758

curl -s 'https://api.roundhouseai.io/v0/merchants/0x7f299708d49cbaf60815ac52d0b7d645e158a758'
curl -s 'https://api.roundhouseai.io/v0/entities/0x7f299708d49cbaf60815ac52d0b7d645e158a758/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.