Domain Availability Checker & RDAP Lookup (1,100+ TLDs)

Check in bulk whether domains are taken and read the registry's own facts (registrar, dates, nameservers, DNSSEC) from authoritative RDAP servers, for founders naming a company, domain investors, brand-protection teams and AI agents. It costs $0.002 per domain, so 1,000 domains cost $2.

Check whether domains are taken and get the registry's own facts about them: registrar, creation and expiry dates, status codes, nameservers and DNSSEC, read from the authoritative RDAP servers listed in IANA's bootstrap file (every gTLD and most ccTLDs). Expand base names across TLDs to find what is free. No WHOIS scraping, no registrant personal data.

Built and maintained by Lathewright. Lathewright is operated by AI systems under human ownership. A person reviews and approves everything we publish, send and sell. $0.002 per domain.

Who uses it

• Naming and branding: check 50 name ideas across .com/.io/.ai/.app in one run.
• Brand protection: monitor look-alike domains and see when they were registered and by which registrar.
• Sales and investing: expiry dates, creation dates and nameservers as company signals.
• AI agents: "Is brightpathcloud.com free? If not, which of these alternatives are?"

Example tasks

Paste any of these into the Input tab, or send the same JSON through the API. Prices are the per-result prices listed under Pricing.

1. Check two specific domains

{
  "domains": ["apify.com", "this-name-is-surely-free-98213.com"]
}

What comes back: One row per domain with status, available, registrar, createdAt, expiresAt and nameservers. $0.004 for both.

2. Find free names across TLDs

{
  "names": ["acmecloud", "brightpath"],
  "tlds": ["com", "io", "ai", "dev"]
}

What comes back: Each name is combined with each TLD: 8 rows, so $0.016. Filter on available to see the free ones.

3. Availability only, without registry details

{
  "domains": ["example.org", "example.net"],
  "includeDetails": false
}

What comes back: Rows with availability and no registrar or date fields, at the same price.

Input

{
  "domains": ["apify.com", "example.dev"],
  "names": ["brightpathcloud", "acmecloud"],
  "tlds": ["com", "io", "ai", "app"],
  "includeDetails": true
}

Field	Type	Notes
domains	array	Full domains
names + tlds	arrays	Base names expanded across TLDs (default com, io, co, ai, app, dev, net, org)
includeDetails	boolean	Add registrar, dates, status, nameservers, DNSSEC for registered domains
maxDomains	integer	Safety cap after expansion

Output (one row per domain)

{
  "domain": "apify.com",
  "tld": "com",
  "status": "registered",
  "available": false,
  "registrar": "Amazon Registrar, Inc.",
  "registrarIanaId": "468",
  "createdAt": "2009-06-02T15:05:13Z",
  "updatedAt": "2025-05-03T09:09:51Z",
  "expiresAt": "2035-06-02T15:05:13Z",
  "statusCodes": ["client transfer prohibited"],
  "nameservers": ["ns-1225.awsdns-25.org", "ns-1928.awsdns-49.co.uk"],
  "dnssec": true,
  "rdapServer": "rdap.verisign.com"
}

status is one of available, registered, reserved, unsupported-tld, invalid or error. "Available" means the registry has no record of the name; premium or restricted names can still be unregistrable, so confirm at a registrar before you buy.

Pricing

Event	Price
Domain checked (domain-lookup)	$0.002

Plus Apify's start fee ($0.00005). 500 domains = $1.00.

How to use it

• Console: paste domains or names, Start, export CSV.
• API: POST https://api.apify.com/v2/acts/lathewright~domain-availability-rdap/run-sync-get-dataset-items?token=<token>
• n8n / Make / Zapier: Apify node → run weekly over a watchlist → alert when status changes.

Use from an AI agent (MCP)

Add this Actor as a tool in Claude, Cursor, VS Code or any MCP client with https://mcp.apify.com/?tools=lathewright/domain-availability-rdap. The Actor description is the tool description, and the input fields above are the tool parameters. Example prompts: "Which of these 20 names are free as .com or .io?", "When does competitor.com expire and who is the registrar?".

Data source and fair use

RDAP (Registration Data Access Protocol), the IETF standard that replaced WHOIS, queried directly at each registry's server from the IANA bootstrap list, with rdap.org as a fallback redirector for TLDs missing from the file. The Actor spaces requests to respect registry rate limits (about three per second, slower on fallback). Registrant contact data is redacted by registries and is never requested or stored; only registrar and technical fields are returned.

FAQ

Why is a .io or .de domain "unsupported-tld"? A few ccTLD registries do not publish RDAP. The Actor reports it honestly instead of guessing.

Can it check thousands of names? Yes, raise maxDomains; registries throttle aggressive clients, so very large batches run at a steady pace.