# Domain WHOIS and DNS lookup API

Domain intelligence in one call: DNS records (A, AAAA, CNAME, MX, NS, TXT, CAA), DNSSEC status, registrar, registration and expiry dates with domain age in days (RDAP/WHOIS), and email authentication (SPF and DMARC records and policies, whether the domain accepts mail). Use for lead qualification, phishing and trust checks, and deliverability audits. For a trust verdict with named flags use domain_report.

## When an agent wants this

- See a domain's DNS records, registrar and registration and expiry dates
- Check domain age before trusting a lead or a sender
- Audit SPF and DMARC for email deliverability

## DNS lookup, WHOIS lookup: DNS, RDAP registration age and email authentication

DNS lookup, WHOIS lookup: DNS, RDAP registration age and email authentication. $0.005 per successful call; failed calls are never charged.

Domain intelligence in one call: DNS records (A, AAAA, CNAME, MX, NS, TXT, CAA), DNSSEC status, registrar, registration and expiry dates with domain age in days (RDAP/WHOIS), and email authentication (SPF and DMARC records and policies, whether the domain accepts mail). Use for lead qualification, phishing and trust checks, and deliverability audits. For a trust verdict with named flags use domain_report.

Inputs: name (required): Domain name, e.g. cloudflare.com.

Free first (25 successful calls per caller, no key):

    curl "https://tools.funwords.eu/domain?name=cloudflare.com&trial=1"

With a card key from https://tools.funwords.eu/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/domain?name=cloudflare.com"
    curl "https://tools.funwords.eu/domain?name=cloudflare.com&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://tools.funwords.eu/mcp) this tool is domain.

Example result:

    {
      "domain": "cloudflare.com",
      "exists": true,
      "dns": {
        "a": [
          "104.16.132.229",
          "104.16.133.229"
        ],
        "mx": [
          {
            "priority": 5,
            "host": "mxa-canary.global.inbound.cf-emailsecurity.net"
          }
        ],
        "ns": [
          "ns3.cloudflare.com",
          "ns4.cloudflare.com"
        ],
        "dnssecValidated": true
      },
      "email": {
        "acceptsMail": true,
        "spfPolicy": "-all",
        "dmarcPolicy": "reject"
      },
      "registration": {
        "registrableDomain": "cloudflare.com",
        "registrar": "Cloudflare, Inc.",
        "registeredAt": "2009-02-17T22:07:54Z",
        "expiresAt": "2033-02-17T22:07:54Z",
        "ageDays": 6441,
        "dnssecSigned": true
      }
    }

Tool page: https://tools.funwords.eu/tools/domain

## DNS records lookup: A, AAAA, MX, TXT, CNAME, NS and more

DNS records lookup: A, AAAA, MX, TXT, CNAME, NS and more. $0.01 per successful call; failed calls are never charged.

Look up DNS records of a domain over DNS-over-HTTPS (Cloudflare 1.1.1.1): A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV, PTR, DS, DNSKEY or HTTPS, with each answer's TTL, the response code (NOERROR, NXDOMAIN…) and whether DNSSEC validated. Use to check email (MX, SPF in TXT), verify a domain, or debug a DNS change; for whether the change has spread use dns_propagation.

Inputs: name (required): Domain name (or a URL; its host is used); type: Record type: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV, PTR, DS, DNSKEY, HTTPS (default A).

Free first (25 successful calls per caller, no key):

    curl "https://tools.funwords.eu/dns/lookup?name=example.com&trial=1"

With a card key from https://tools.funwords.eu/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/dns/lookup?name=example.com"
    curl "https://tools.funwords.eu/dns/lookup?name=example.com&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://tools.funwords.eu/mcp) this tool is dns_lookup.

Example result:

    {
      "name": "example.com",
      "type": "MX",
      "status": "NOERROR",
      "dnssec": true,
      "answers": [
        {
          "data": "0 .",
          "ttl": 86400
        }
      ],
      "resolver": "Cloudflare"
    }

Tool page: https://tools.funwords.eu/tools/dns-lookup

## Domain lookup, trust verdict: age, DNS and email-auth flags

Domain lookup, trust verdict: age, DNS and email-auth flags. $0.01 per successful call; failed calls are never charged.

A trust verdict for any domain in one call: high/medium/low trust with named flags for very new registrations, expiry, missing or weak SPF and DMARC, too few nameservers, no web host and non-resolving domains, plus the key facts (registrar, age, nameservers, DNSSEC). Use for lead qualification, phishing and vendor checks, and before an agent sends mail to or trusts a domain. Signals only, not a guarantee. Raw DNS records: domain.

Inputs: name (required): Domain name, e.g. cloudflare.com.

Free first (25 successful calls per caller, no key):

    curl "https://tools.funwords.eu/domain-report?name=cloudflare.com&trial=1"

With a card key from https://tools.funwords.eu/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/domain-report?name=cloudflare.com"
    curl "https://tools.funwords.eu/domain-report?name=cloudflare.com&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://tools.funwords.eu/mcp) this tool is domain_report.

Example result:

    {
      "domain": "cloudflare.com",
      "trust": "high",
      "summary": "high trust: 0 high and 0 medium flag(s). Based on DNS, registration and email-authentication signals only.",
      "flags": [],
      "facts": {
        "exists": true,
        "registrar": "Cloudflare, Inc.",
        "registeredAt": "2009-02-17T22:07:54Z",
        "expiresAt": "2033-02-17T22:07:54Z",
        "ageDays": 6447,
        "nameservers": [
          "ns3.cloudflare.com",
          "ns4.cloudflare.com"
        ],
        "acceptsMail": true,
        "spfPolicy": "-all",
        "dmarcPolicy": "reject",
        "dnssecValidated": true
      },
      "checkedAt": "2026-10-14T19:25:28.425Z"
    }

Tool page: https://tools.funwords.eu/tools/domain-report

## Questions

Docs for agents: https://tools.funwords.eu/llms.txt · OpenAPI: https://tools.funwords.eu/openapi.json · All guides: https://tools.funwords.eu/guides