Bulk Domain Availability & WHOIS (RDAP) Checker

Check thousands of domain names for availability and get their registration data in one run. For each domain you get whether it's available or registered, and for registered domains the registrar, creation date, expiry date, domain age, days until expiry, EPP status codes, nameservers and DNSSEC — straight from the official registry RDAP service (the modern, structured replacement for WHOIS).

Need name ideas? Enter keywords + TLDs (and optional prefixes/suffixes like get, try, hq) and the Actor generates and checks every combination.

$1 per 1,000 domains, no subscription, failed lookups are free.

Use cases

• 🚀 Naming a startup or product — check brand × .com/.io/.ai/.co/.app/.dev in seconds
• 📅 Domain portfolio monitoring — schedule a weekly run and catch upcoming expirations
• 🕵️ Expiring / drop-catching research — find domains in pending delete / redemption status
• 🧾 Lead qualification & due diligence — domain age, registrar and nameservers for a list of companies
• 🧹 Spot unused domains — optional website (A record) and email (MX) checks for registered domains

How it works

1. The Actor reads IANA's official RDAP bootstrap file to find each TLD's registry RDAP server (Verisign for .com/.net, PIR for .org, Google for .app/.dev, Identity Digital for .ai, Nominet for .uk, and hundreds more).
2. A 404 Not Found from the registry means the domain is available; otherwise registration data is parsed into clean fields.
3. For TLDs without public RDAP (some ccTLDs such as .io, .co, .de, .me) it falls back to a DNS delegation check and marks the result probably-available / registered with method: "dns".

Input example

{
    "domains": ["google.com", "my-new-startup-idea-2026.com"],
    "keywords": ["parthtools", "rocketdata"],
    "tlds": ["com", "io", "ai", "co"],
    "prefixes": ["get"],
    "onlyAvailable": false,
    "includeDns": true
}

Output example

{
    "domain": "google.com",
    "status": "registered",
    "available": false,
    "method": "rdap",
    "registrar": "MarkMonitor Inc.",
    "registrarIanaId": "292",
    "createdAt": "1997-09-15T04:00:00Z",
    "expiresAt": "2028-09-14T04:00:00Z",
    "updatedAt": "2019-09-09T15:39:04Z",
    "ageDays": 10630,
    "daysUntilExpiry": 691,
    "eppStatus": ["client delete prohibited", "client transfer prohibited", "server update prohibited"],
    "nameservers": ["ns1.google.com", "ns2.google.com", "ns3.google.com", "ns4.google.com"],
    "dnssec": false,
    "hasWebsite": true,
    "hasEmail": true
}

Statuses: available, probably-available (DNS fallback), registered, expiring (pending delete / redemption), unknown.

Pricing

Event	Price	When
Domain checked	$0.001 ($1 / 1,000 domains)	Each domain result
Actor start	$0.00005	Once per run

FAQ

Is "available" guaranteed? RDAP comes from the registry itself, so it's very reliable, but premium or reserved names may still not be purchasable at the standard price — confirm at your registrar before buying.

Why don't I see the owner's name or email? Registrant contact details are redacted by registries for privacy (GDPR), and this Actor intentionally does not collect personal data. You get registrar, dates, status and nameservers.

Does it use WHOIS port 43? No — it uses RDAP over HTTPS, the official successor to WHOIS required by ICANN for gTLDs.

Rate limits? Requests are spaced per registry with automatic retries. Large lists (10,000+) work fine; just allow more time.