ToolVet
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Dmarc Lookup

by Bulk DMARC Record Lookup in Email & messaging

x402 APIPassing, checked 3 h ago

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.

POST https://dmarc-lookup.underscoredone.com/dmarc-lookup

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
248 ms typical, 248 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://dmarc-lookup.underscoredone.com/dmarc-lookup" \
  -H "content-type: application/json" \
  -d '{"domains":["onescales.com","hillms.com","google.com"]}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdmarc-lookup.underscoredone.com%2Fdmarc-lookup
const res = await pay("https://dmarc-lookup.underscoredone.com/dmarc-lookup", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"domains":["onescales.com","hillms.com","google.com"]}),
});
console.log(await res.json());

Example input

{
  "domains": [
    "onescales.com",
    "hillms.com",
    "google.com"
  ]
}

Example output

{
  "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
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402248 ms$0.01