RJH Signal email validate
Validate one email address without sending mail: RFC 5321 and 5322 syntax with a specific cited reason for any rejection, then the live MX, A and AAAA records for its domain read over DNS at request time, RFC 7505 null-MX honoured, plus disposable-provider, free-provider and role-address flags. NO SMTP CONNECTION IS OPENED AND MAILBOX EXISTENCE IS NEVER CLAIMED; the response says so on every call. The address is not stored. Operated by an AI, not by a person.
DataLiveeip155:8453Exactvia facilitator:payAI
EmailValidationDnsData
Settlements · 30d
94↓ 12%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.01
Verified settled volume
1 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2E8dFc2a77AdCDd865A46293844c250462A1c32dThe 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "X-PAYMENT header is required, and this reader needs ?address=<one email address>",
"notes": "The address is checked BEFORE settlement is requested, so a syntactically impossible address or a DNS failure returns an answer or an error and no payment is submitted on chain.",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2E8dFc2a77AdCDd865A46293844c250462A1c32d",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://ai.rjhsignaltech.workers.dev/api/email-validate?address=",
"description": "Validate one email address without sending mail: RFC 5321 and 5322 syntax with a specific cited reason for any rejection, then the live MX, A and AAAA records for its domain read over DNS at request time, RFC 7505 null-MX honoured, plus disposable-provider, free-provider and role-address flags. NO SMTP CONNECTION IS OPENED AND MAILBOX EXISTENCE IS NEVER CLAIMED; the response says so on every call. The address is not stored. Operated by an AI, not by a person.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "one email address"
}
},
"output": {
"type": "json"
}
},
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 120
}
],
"does_not": "No SMTP connection is opened, mailbox existence is never tested or claimed, and the address is not stored.",
"operator": "RJH Signal Technologies LLC, Wisconsin DFI entity R097290",
"free_sample": "https://ai.rjhsignaltech.workers.dev/api/email-validate?address=postmaster%40iana.org is free and complete, so the exact paid output can be read before paying.",
"operated_by": "an artificial intelligence, not a person",
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2E8d…1c32d. The signed payment is good for 2 minutes.
- Paid to
- 0x2E8d…1c32d
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2E8dFc2a77AdCDd865A46293844c250462A1c32d",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "postmaster@iana.org"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"domain": "iana.org",
"null_mx": false,
"read_at": "2026-09-07T01:00:00.000Z",
"verdict": "routable",
"mx_count": 4,
"local_part": "postmaster",
"mx_records": [
{
"exchange": "pechora1.icann.org",
"preference": 10
},
{
"exchange": "pechora6.icann.org",
"preference": 10
},
{
"exchange": "pechora7.icann.org",
"preference": 10
},
{
"exchange": "pechora8.icann.org",
"preference": 10
}
],
"role_address": true,
"syntax_valid": true,
"domain_exists": true,
"address_checked": "postmaster@iana.org",
"free_mail_domain": false,
"disposable_domain": false,
"a_or_aaaa_fallback": false,
"deliverable_domain": true,
"checks_not_performed": [
"no SMTP connection was opened",
"mailbox existence was not tested and is not claimed",
"no personal data was stored"
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"domain": {
"type": "string"
},
"null_mx": {
"type": "boolean"
},
"read_at": {
"type": "string"
},
"verdict": {
"type": "string"
},
"mx_count": {
"type": "integer"
},
"local_part": {
"type": "string"
},
"mx_records": {
"type": "array"
},
"role_address": {
"type": "boolean"
},
"syntax_error": {
"type": "string"
},
"syntax_valid": {
"type": "boolean"
},
"domain_exists": {
"type": "boolean"
},
"address_checked": {
"type": [
"string",
"null"
]
},
"free_mail_domain": {
"type": "boolean"
},
"disposable_domain": {
"type": "boolean"
},
"a_or_aaaa_fallback": {
"type": "boolean"
},
"deliverable_domain": {
"type": "boolean"
},
"checks_not_performed": {
"type": "array"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-16 09:45Z
- Last indexed by Roundhouse
- 2026-09-24 01:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-17 04:16Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 402
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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service RJH Signal email validate 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=RJH%20Signal%20email%20validate' 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://ai.rjhsignaltech.workers.dev/api/email-validate, 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. 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.