Give this tool a list of domain names and it will instantly check each one's DMARC email s
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.
10000 (raw units)
price
3
calls / 30d
3
unique payers
2026-09-14
updated
Provider
dmarc-lookup.underscoredone.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"domains": [
"onescales.com",
"hillms.com",
"google.com"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"api_version": "1.0.0",
"invalid_count": 0,
"not_found_count": 1,
"results": [
{
"domain": "onescales.com",
"domainPolicy": "reject",
"rawRecord": "v=DMARC1;p=reject;rua=mailto:[email protected],mailto:[email protected],mailto:[email protected];ruf=mailto:[email protected];fo=1;",
"recordStatus": "Valid",
"reportingEnabled": true
},
{
"domain": "hillms.com",
"domainPolicy": "reject",
"rawRecord": "v=DMARC1;p=reject;rua=mailto:[email protected];",
"recordStatus": "Valid",
"reportingEnabled": true
},
{
"domain": "nodmarc-example.com",
"domainPolicy": "",
"rawRecord": "",
"recordStatus": "Not Found",
"reportingEnabled": false
}
],
"total": 3,
"valid_count": 2
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"domains": {
"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\"]",
"type": "array"
}
},
"required": [
"domains"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"api_version": {
"type": "string"
},
"invalid_count": {
"type": "integer"
},
"not_found_count": {
"type": "integer"
},
"results": {
"items": {
"type": "object"
},
"type": "array"
},
"total": {
"type": "integer"
},
"valid_count": {
"type": "integer"
}
},
"required": [
"api_version",
"results",
"total",
"valid_count",
"invalid_count",
"not_found_count"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
}Use it
curl
curl "https://dmarc-lookup.underscoredone.com/dmarc-lookup" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://dmarc-lookup.underscoredone.com/dmarc-lookup");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://dmarc-lookup.underscoredone.com/dmarc-lookup")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/3625.json, and this resource appears in /discovery/resources and /discovery/search.