Bulk DMARC Record Lookup
Other PAYMENT-READYpayment-ready until 2026-08-20
Give this tool a list of domain names and it will instantly check each one's DMARC email security record. DMARC is a standard that tells email providers how to handle fake or spoofed emails pretending to come from your domain. For each domain you submit, you get back whether a valid record exists, what the policy is (none, quarantine, or reject), whether reporting addresses are set up, and the full raw record text. Perfect for auditing many domains at once without any setup.
Pay from $0.01 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.
first settlement 2026-05-05 · $11.30 all-time · settled via coinbase, payAI
ASSESSMENT
updated 4h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 1579ms
- avg response
- 838ms
- total checks
- 2,736
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (14/14)
14 of 14 x402 conformance checks pass. Full checklist below.
price $0.01 (p75 in Other)
- price (min)
- $0.01
- category percentile (min)
- p75 in Other
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
traction $10.4966666667 30d · 27 buyers
- volume 30d
- $10.4966666667
- buyers 30d
- 27
- settlements 30d
- 137
- first settlement
- 2026-05-05
- last settlement
- 2026-08-13
- top buyer share
- 65% of 30d volume
- trend 7d vs 30d
- 0.04x the 30d daily rate
- networks
- eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
- volume all-time
- $11.30
- settlements all-time
- 369
- median settlement 30d
- $0.01
- max settlement 30d
- $10.00
- settled via
- coinbase ($31.40, 128 tx), payAI ($0.09, 9 tx)
Attributed pro-quota: this payout address is shared, so volume is the operator-level figure divided by the services sharing it, while buyer and transaction counts stay whole. A declared convention, not an individually observed measure, and still a conservative undercount.
Currently sharing this payout address with Curl HTTP Request, US CPI Data & Inflation Report API.
Top buyer share is a concentration signal, not part of the ranking score.
CHANGES
1 event, detecting since 2026-07-24Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.
changes schema changed 26h ago (1 since 2026-07-24)
schema changed · 26h ago
schema removed GET /dmarc-lookup exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"}
schema added GET /dmarc-lookup exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}
WHAT IT DOES
ai-derivedLooks up DMARC email security records for domains
- category
- email-security
- in
- query params
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /dmarc-lookup | $0.01 | Base/Solana | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /dmarc-lookup returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://dmarc-lookup.underscoredone.com/dmarc-lookup'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://dmarc-lookup.underscoredone.com/dmarc-lookup",
"tags": [
"dmarc",
"dmarc record",
"email security",
"dmarc lookup",
"email authentication"
],
"mimeType": "application/json",
"description": "Give this tool a list of domain names and it will instantly check each one's DMARC email security record. DMARC is a standard that tells email providers how to handle fake or spoofed emails pretending to come from your domain. For each domain you submit, you get back whether a valid record exists, what the policy is (none, quarantine, or reject), whether reporting addresses are set up, and the full raw record text. Perfect for auditing many domains at once without any setup.",
"serviceName": "Bulk DMARC Record Lookup"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"domains": [
"onescales.com",
"hillms.com",
"google.com"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"total": 3,
"results": [
{
"domain": "onescales.com",
"rawRecord": "v=DMARC1;p=reject;rua=mailto:[email protected],mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected];fo=1;",
"domainPolicy": "reject",
"recordStatus": "Valid",
"reportingEnabled": true
},
{
"domain": "hillms.com",
"rawRecord": "v=DMARC1;p=reject;rua=mailto:[email protected];",
"domainPolicy": "reject",
"recordStatus": "Valid",
"reportingEnabled": true
},
{
"domain": "nodmarc-example.com",
"rawRecord": "",
"domainPolicy": "",
"recordStatus": "Not Found",
"reportingEnabled": false
}
],
"api_version": "1.0.0",
"valid_count": 2,
"invalid_count": 0,
"not_found_count": 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": [
"domains"
],
"properties": {
"domains": {
"type": "array",
"description": "A JSON array of one or more domain names. Use bare domain names only — no http://, https://, or www. Example: [\"example.com\", \"mycompany.org\", \"another.io\"]"
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"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": [
"api_version",
"results",
"total",
"valid_count",
"invalid_count",
"not_found_count"
],
"properties": {
"total": {
"type": "integer"
},
"results": {
"type": "array",
"items": {
"type": "object"
}
},
"api_version": {
"type": "string"
},
"valid_count": {
"type": "integer"
},
"invalid_count": {
"type": "integer"
},
"not_found_count": {
"type": "integer"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 24h selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/bulk-dmarc-record-lookup/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.
Shared payout address (2 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 3 services sharing it: a declared convention, not an individually observed measure.
Shared payout address (2 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Per-service buyer and transaction counts are shown whole (integers), not divided; only volume is attributed pro-quota. A declared convention, not an individually observed measure.
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-08-12 · last up 2026-08-13
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
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