Blackwood State Email Batch
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DataLiveeip155:8453Exactvia cdp
Bulk email validationEmail list verificationVerify emailData
Calls · 30d
4
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far.
$0.10
Verified settled volume
5 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-19 04:18Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x274508F17CDb74BbBe4241F3cA618709d0a5528cThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x2745…5528c. The signed payment is good for 1 minute.
- Paid to
- 0x2745…5528c
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 20000 smallest units
0.02USDC≈ $0.02 USD
on Base · upto scheme
Pay 0.02 USDC on Base to 0x2745…5528c. The signed payment is good for 1 minute.
- Paid to
- 0x2745…5528c
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x274508F17CDb74BbBe4241F3cA618709d0a5528c",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"facilitatorAddress": "0x93F6601151cCB08F333AB4B1CCcfb1e188c0bE44",
"assetTransferMethod": "permit2"
},
"payTo": "0x274508F17CDb74BbBe4241F3cA618709d0a5528c",
"amount": "20000",
"scheme": "upto",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"emails": [
"postmaster@ietf.org",
"test@mailinator.com",
"info@example.com",
"not-an-email"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"count": 4,
"domains": 3,
"results": [
{
"mx": [
{
"host": "mx.ietf.org",
"priority": 0
}
],
"spf": "v=spf1 ip4:166.84.6.31 ip4:166.84.7.238 ip6:2602:f977:800:f7f6::/64 ip4:166.84.7.34 ip6:2602:f977:800::e276:63ff:fe66:3400 include:_spf.google.com include:spf.hostedrt.com ~all",
"dmarc": "v=DMARC1; p=none; rua=mailto:dmarc_agg@vali.email,mailto:dmarc-report@ietf.org",
"email": "postmaster@ietf.org",
"domain": "ietf.org",
"reasons": [
"role_account"
],
"verdict": "deliverable_domain",
"disposable": false,
"normalized": "postmaster@ietf.org",
"acceptsMail": true,
"dmarcPolicy": "none",
"roleAccount": true,
"smtpChecked": false,
"syntaxValid": true,
"domainExists": true,
"freeProvider": false
},
{
"mx": [
{
"host": "mail.mailinator.com",
"priority": 1
},
{
"host": "mail2.mailinator.com",
"priority": 1
}
],
"spf": "v=spf1 -all",
"dmarc": "v=DMARC1;p=reject;sp=reject;aspf=s;pct=100",
"email": "test@mailinator.com",
"domain": "mailinator.com",
"reasons": [
"disposable"
],
"verdict": "risky",
"disposable": true,
"normalized": "test@mailinator.com",
"acceptsMail": true,
"dmarcPolicy": "reject",
"roleAccount": false,
"smtpChecked": false,
"syntaxValid": true,
"domainExists": true,
"freeProvider": false
},
{
"mx": [],
"spf": "v=spf1 -all",
"dmarc": "v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s",
"email": "info@example.com",
"domain": "example.com",
"reasons": [
"null_mx",
"role_account"
],
"verdict": "undeliverable",
"disposable": false,
"normalized": "info@example.com",
"acceptsMail": false,
"dmarcPolicy": "reject",
"roleAccount": true,
"smtpChecked": false,
"syntaxValid": true,
"domainExists": true,
"freeProvider": false
},
{
"mx": [],
"spf": null,
"dmarc": null,
"email": "not-an-email",
"domain": null,
"reasons": [
"syntax"
],
"verdict": "invalid",
"disposable": false,
"normalized": null,
"acceptsMail": false,
"dmarcPolicy": null,
"roleAccount": false,
"smtpChecked": false,
"syntaxValid": false,
"domainExists": null,
"freeProvider": false
}
],
"summary": {
"risky": 1,
"invalid": 1,
"unknown": 0,
"undeliverable": 1,
"deliverable_domain": 1
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"emails"
],
"properties": {
"emails": {
"type": "array",
"items": {
"type": "string",
"maxLength": 320
},
"maxItems": 20,
"minItems": 1,
"description": "Email addresses to check, 1 to 20, e.g. [\"jane@example.com\", \"info@ietf.org\"]"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"count",
"domains",
"summary",
"results"
],
"properties": {
"next": {
"type": "object",
"required": [
"service",
"tool",
"method",
"url",
"useWhen",
"sample"
],
"properties": {
"url": {
"type": "string",
"description": "Paid route of the next call"
},
"tool": {
"type": "string",
"description": "MCP tool name of the same call"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"sample": {
"type": "string",
"description": "Free fixed sample of the whole family"
},
"service": {
"type": "string",
"description": "Service id of the suggested next paid call"
},
"useWhen": {
"type": "string",
"description": "When the next call is the right one"
}
},
"description": "Suggested next paid call in the same family (call it in a loop when the task continues)",
"additionalProperties": false
},
"count": {
"type": "number"
},
"domains": {
"type": "number"
},
"results": {
"type": "array",
"items": {
"type": "object",
"required": [
"email",
"normalized",
"syntaxValid",
"domain",
"disposable",
"freeProvider",
"roleAccount",
"domainExists",
"mx",
"acceptsMail",
"spf",
"dmarc",
"dmarcPolicy",
"verdict",
"reasons",
"smtpChecked"
],
"properties": {
"mx": {
"type": "array",
"items": {
"type": "object",
"required": [
"priority",
"host"
],
"properties": {
"host": {
"type": "string"
},
"priority": {
"type": "number"
}
},
"additionalProperties": false
}
},
"spf": {
"type": [
"string",
"null"
]
},
"dmarc": {
"type": [
"string",
"null"
]
},
"email": {
"type": "string"
},
"domain": {
"type": [
"string",
"null"
]
},
"reasons": {
"type": "array",
"items": {
"type": "string"
}
},
"verdict": {
"enum": [
"deliverable_domain",
"risky",
"undeliverable",
"invalid",
"unknown"
],
"type": "string"
},
"disposable": {
"type": "boolean"
},
"normalized": {
"type": [
"string",
"null"
]
},
"acceptsMail": {
"type": "boolean"
},
"dmarcPolicy": {
"type": [
"string",
"null"
]
},
"roleAccount": {
"type": "boolean"
},
"smtpChecked": {
"type": "boolean"
},
"syntaxValid": {
"type": "boolean"
},
"domainExists": {
"type": [
"boolean",
"null"
]
},
"freeProvider": {
"type": "boolean"
}
},
"additionalProperties": false
}
},
"summary": {
"type": "object",
"required": [
"deliverable_domain",
"risky",
"undeliverable",
"invalid",
"unknown"
],
"properties": {
"risky": {
"type": "number"
},
"invalid": {
"type": "number"
},
"unknown": {
"type": "number"
},
"undeliverable": {
"type": "number"
},
"deliverable_domain": {
"type": "number"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 13:44Z
- Last indexed by Roundhouse
- 2026-10-26 14:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 00:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 200
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Blackwood State Email Batch and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Blackwood%20State%20Email%20Batch' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402-gateway.blackwoodstate8.workers.dev/v1/email-batch, never from a cached figure, and pay with an x402 client. 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.