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DNS & WHOIS Bulk Lookup
x402
DNS & WHOIS Bulk Lookup is a paid API for AI agents from dns-whois-lookup.underscoredone.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).
Looks up all DNS record types and full WHOIS registration data for up to 10 domains in a single request, returning one flat row per domain.
Price / call$0.01
Success—
StatusUnknown
How this service works
Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per domain, ready to drop into a spreadsheet, database, or pipeline.
Output
Returns one flat row per domain containing all DNS record types (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) and the full WHOIS registration profile (registrar, creation/expiry/updated dates, registrant/admin/tech contacts, domain status flags, and nameservers). URLs are automatically reduced to bare domains, and duplicates are de-duplicated before processing.
Example use cases
Vet supplier domains before contracting
“I need you to check the DNS and WHOIS info for our five potential vendors' domains. Pull their registrar, expiry dates, nameservers, and MX records so we can verify they're legitimate and won't disappear mid-contract.”
Investigate phishing and fraud links
“Can you look up the full DNS records and WHOIS details for these ten suspicious domains we flagged in our security logs? I need to see who registered them, when they expire, their nameservers, and all A records to spot patterns.”
Enrich sales prospect company data
“Pull the DNS and WHOIS profiles for this list of fifteen prospect company domains. I want their registrars, creation dates, registrant contacts, TXT records, and nameservers so I can verify legitimacy and find technical contacts.”
Technical details
Endpoint
POSThttps://dns-whois-lookup.underscoredone.com/lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need both DNS records and WHOIS registration data in a single call for up to 10 domains. It is ideal for domain intelligence pipelines, cybersecurity research, due diligence workflows, or spreadsheet enrichment where you want a flat, combined row per domain rather than making separate DNS and WHOIS API calls. It automatically handles URL stripping and deduplication, making it convenient for messy input lists.
Side effects
- Invalid or unresolvable domain returns empty or null DNS fields
- Domain with no WHOIS record (e.g. private TLD) returns empty WHOIS fields
- More than 10 domains submitted causes request rejection or truncation
- Malformed input (non-string entries in array) causes validation error
- Rate limiting or payment failure (x402) prevents the call from completing
- Recently registered or propagating domains may return incomplete DNS data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domains | array | A list of domain names or full web addresses to look up. You can pass bare domains like 'example.com', or full addresses like 'https://www.example.com/page' — the system will automatically extract just the domain. Send between 1 and 10 entries per request. |
Output
Schema · Response
{
"type": "json",
"example": {
"results": [
{
"dns_a": "23.227.38.65",
"dns_ds": "",
"dns_mx": "5 alt2.aspmx.l.google.com | 1 aspmx.l.google.com | 10 alt3.aspmx.l.google.com | 10 alt4.aspmx.l.google.com | 5 alt1.aspmx.l.google.com",
"dns_ns": "carter.ns.cloudflare.com | bonnie.ns.cloudflare.com",
"domain": "onescales.com",
"dns_caa": "",
"dns_ptr": "",
"dns_soa": "mname=bonnie.ns.cloudflare.com rname=dns.cloudflare.com serial=2406862386 refresh=10000 retry=2400 expire=604800 minttl=1800",
"dns_srv": "",
"dns_txt": "openai-domain-verification=dv-Y9cDXv64Bj8Z6h43mpki1rgt | v=spf1 include:_spf.google.com ~all",
"dns_aaaa": "",
"dns_tlsa": "",
"checkedAt": "2026-06-15T01:45:08.607Z",
"dns_cname": "",
"dns_naptr": "",
"whois_status": "clientTransferProhibited",
"whois_created": "2022-10-11T10:20:28Z",
"whois_expires": "2028-10-11T10:20:28Z",
"whois_iana_id": "1910",
"whois_updated": "2023-02-13T02:38:06Z",
"whois_admin_org": "",
"whois_registrar": "Cloudflare, Inc.",
"whois_admin_name": "",
"whois_admin_email": "",
"whois_nameservers": "bonnie.ns.cloudflare.com | carter.ns.cloudflare.com",
"whois_admin_country": "",
"whois_registrar_url": "http://www.cloudflare.com",
"whois_registrant_org": "",
"whois_registrant_name": "",
"whois_registrant_phone": "",
"whois_registrant_address": "",
"whois_registrant_country": "",
"whois_registrar_abuse_email": "registrar-abuse@cloudflare.com",
"whois_registrar_abuse_phone": "+1.6503198930"
}
],
"api_version": "1.0.0"
}
}Tags
x402
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