1–1000 domain names or HTTP(S) URLs. IDNs become punycode. RDAP uses the registrable domain from the offline Public Suffix List; DNS uses the requested host. Paths are removed; credentials and ports are rejected. Equivalent hosts produce one result.

Type:string[]

Min. items:1

Max. items:1000

Check DNS

checkDns

Optional

Enable DNS-over-HTTPS queries. False disables all DNS, DMARC and DS queries.

Type:boolean

Default:true

DNS record types

dnsRecordTypes

Optional

Records to fetch. Derived MX and SPF fields are null when their record type is not selected.

Type:string[]

Min. items:1

Default:

[
  "A",
  "AAAA",
  "MX",
  "NS",
  "TXT"
]

Check DMARC

checkDmarc

Optional

Query TXT at _dmarc.. No organizational-domain inheritance lookup.

Type:boolean

Default:true

Check DNSSEC

checkDnssec

Optional

Query DS records and expose resolver AD validation. This is presence evidence, not an independent cryptographic audit.

Type:boolean

Default:true

Concurrent domains

maxConcurrency

Optional

1–10 workers with ordered output and bounded buffering. One active RDAP request per server; eight concurrent requests per DoH resolver.

Type:integer

Minimum:1

Maximum:10

Default:5

Bulk WHOIS Lookup: Domain Age, Expiry, Registrar

thoob/rdap-domain-lookup

Looks up domain registration data through official IANA RDAP servers (the structured-JSON successor to WHOIS): registrar, key dates, status codes, nameservers, DNSSEC, and abuse contact. Clean fields, no mangled WHOIS text. Billed only per resolved domain.

Pono Data

Domain Security & Email Deliverability — DNS, SPF, DMARC, DKIM

ryanclinton/dns-record-lookup

Audit a domain portfolio for email spoofing, broken SPF, DMARC enforcement, DNSSEC and shadow-SaaS senders. Returns a posture score, what to fix first, vendor dependencies and drift alerts — not just records. Bulk DNS / SPF / DMARC / DKIM lookup, no API keys.

Ryan Clinton

DNS Lookup – Bulk DNS Records, MX, SPF & DMARC Checker

gazidev/bulk-dns-lookup

Bulk DNS lookup for thousands of domains: A, AAAA, MX, NS, TXT, CNAME, SOA, CAA records, SPF checker with 10-lookup limit, DMARC policy & rua, DKIM selectors, MTA-STS, BIMI, reverse DNS, change monitoring. Pick resolver: 1.1.1.1, 8.8.8.8 or custom. $1 per 1,000 domains.

Cemal Atakli

Bulk Domain Checker: WHOIS Lookup, DNS, SSL & HTTP

aiqlabs/bulk-domain-checker

Check a list of domains in one run: DNS records, mail provider from MX, SPF/DMARC, HTTP status and full redirect chain, SSL certificate expiry, and WHOIS/RDAP registration - plus a plain-English issue list per domain. No API keys.

Ai-Q Labs

Domain Inspector — WHOIS/RDAP, DNS & SSL

hipersoft/domain-inspector

Inspect any list of domains: registrar, registration/expiry dates and status via RDAP; DNS records (A, AAAA, MX, NS, TXT, CNAME); and SSL certificate issuer and expiry. Bulk-ready, no setup. Great for domain portfolios, security audits and lead research.

hiper soft

Bulk Domain DNS & RDAP Lookup – SPF, DMARC, MX, Registrar

polychrome_haymow/domain-dns-rdap

Enrich up to 10,000 domains per run: A/AAAA/MX/NS/TXT, SPF & DMARC via DNS-over-HTTPS, plus registrar, created/expiry dates, status and DNSSEC via RDAP. No WHOIS, no personal data.

Levani Zurabiani

Domain WHOIS, DNS and SSL Expiry Lookup (RDAP)

pistachio_implementation/domain-whois-dns-ssl-lookup

Bulk domain lookup from official sources. Registrar, creation date, age and expiry date via RDAP, the modern WHOIS; A, MX, NS, TXT, SPF and DMARC records; and the SSL certificate issuer and days to expiry. $1.50 per 1,000 domains.

Hay Equipos

SPF, DMARC & DKIM Checker: Bulk Email Domain DNS Audit

datawright-labs/email-domain-dns-checker

Bulk email authentication audit for any list of domains or emails: SPF (with recursive 10-lookup count), DMARC policy, DKIM selectors, MX and mail provider, BIMI, MTA-STS and TLS-RPT. Score 0-100, status and a plain-English problems list per domain.

Datawright Labs

Domain RDAP Intelligence API

intimate_pacu/domain-rdap-intelligence-api

Fetch public RDAP domain registration, registrar, nameserver, status, and lifecycle signals for due diligence and domain intelligence workflows.

Intimate PAcu

Domain WHOIS and DNS Lookup: registrar, age, expiry (RDAP)

bepolabs/domain-rdap

Paste domains or URLs and get one result each: who registered it, when it was created and runs out, name servers, A and MX entries, SPF text. Free names are flagged.