Bulk WHOIS & Domain Availability Checker (RDAP): Expiry, DNS

Look up thousands of domains at once from the official RDAP registries (the modern WHOIS): availability, registrar, created/updated/expiry dates, days until expiry, status, nameservers, DNSSEC and live DNS records. Give a list of domains, or names × TLDs to find which brand names are free.

• Who it's for: domain investors and brand teams, security and fraud analysts, agencies managing client domains, lead enrichment.
• Source: IANA RDAP bootstrap and each registry's RDAP server, plus DNS. No API key, no login; personal registrant data is not returned.
• Trustworthy availability: available only when the registry itself answers "not found"; anything doubtful is unknown with a note.
• Output: JSON, CSV or Excel; pay per domain returned (see the Pricing tab).

Quick start (one click)

Open the Actor and press Start: the form is prefilled with this input.

{
  "domains": [
    "apify.com",
    "example.org",
    "bbc.co.uk"
  ]
}

Sample output (one row, more fields in the dataset):

domain	registered	registrar	registrarIanaId	createdAt
github.com	true	MarkMonitor Inc.	292	2007-10-09T18:20:50Z

Use cases

Brainstorm names across TLDs. Every name in every TLD, with availability.

{"names": ["acmerobotics", "acmebots"], "tlds": ["com", "io", "ai", "co"], "includeDns": false}

Portfolio expiry monitoring. Your domains expiring within 60 days; schedule weekly.

{"domains": ["example.com", "example.org"], "expiringWithinDays": 60}

Lead enrichment from DNS. Registrar, nameservers and mail provider (MX) for a list of company domains.

{"domains": ["apify.com", "bbc.co.uk"], "includeDns": true, "dnsRecordTypes": ["MX", "NS"]}

Brand-protection triage. Which lookalike domains are registered, and by which registrar.

{"names": ["examp1e", "exampel"], "tlds": ["com", "net", "org"]}

How it compares

Checked against the most-used domain / WHOIS lookup actors in the Apify Store (their Store pages, input forms, reviews and Issues tabs, 23 Oct 2026). Alternatives are described generically; every claim about them is visible on their public pages.

	This actor	Common in the alternatives
"Available" verdict	availability is available only when the authoritative RDAP registry answers "not found"; otherwise registered or unknown with an availabilityNote	An open issue on one alternative reports domains shown as available that were not (missing DNS was treated as available)
Bulk input	List of domains, or names × tlds (e.g. 50 names × 6 TLDs = 300 checks in one run)	Usually a plain domain list; one offers names × TLDs
Expiring domains	expiresInDays on every row + expiringWithinDays filter (rows outside the window are not returned and not charged)	Rare
Plan gating	No free-plan or batch-size gate: 1,000+ domains run the same way on any Apify plan	An open issue on the most-used alternative: a 1,000-domain run refused, saying the user was on a free plan
Extras	DNS records (A, AAAA, MX, NS, TXT...), registrar, created/updated/expiry dates, DNSSEC, nameservers	Varies
Price	$2 per 1,000 domains + $0.005 per run (see the Pricing tab)	From free to about $10 per 1,000 plus start fees
Not included	Registrant names/emails (redacted by registries; we don't return personal data)	Same

Ready-to-copy inputs

Find which brand names are free across six TLDs:

{"names": ["acmerobotics", "acme-robotics"], "tlds": ["com", "net", "org", "io", "co", "ai"]}

Domains in your list that expire within 60 days:

{"domains": ["example.com", "example.net", "example.org"], "expiringWithinDays": 60}

Features and details of this WHOIS domain lookup API

Bulk-check domains using RDAP, the official ICANN successor of WHOIS, routed through the IANA RDAP bootstrap to each registry's own server, plus live DNS records via DNS-over-HTTPS. No API key, no proxies, no scraping of WHOIS websites.

What you get per domain

field	example
domain, unicodeName	github.com
registered	true / false (RDAP 404) / null (unknown)
registrar, registrarIanaId, registrarUrl	MarkMonitor Inc., 292
status	["client delete prohibited", ...]
createdAt, updatedAt, expiresAt	ISO 8601
nameservers	["dns1.p08.nsone.net", ...]
dnssec	true/false
dns	{"A":[...],"AAAA":[...],"MX":[...],"NS":[...],"TXT":[...]}
days_until_expiry	137 (whole days to expiresAt; negative if expired; null when the registry publishes no expiry)
expiring_soon	true if expiring within expiringSoonDays (default 30) or already expired, else false; null without an expiry date
registrar_abuse_email	abusecomplaints@markmonitor.com: the registrar's abuse desk, only when RDAP lists it and the address is an abuse role address; otherwise null
rdapServer, registrarRdapUrl, registeredSource, error, checkedAt	provenance

Privacy by design

Only registry/technical data is returned. All registrant, administrative, technical, billing and abuse contacts, vCards and remarks are dropped before output; only the registrar's (company) name and IANA id are kept. The one exception is registrar_abuse_email: the registrar's own abuse desk, returned only if its local part contains "abuse" (e.g. abuse@, abusecomplaints@); any other address, such as a named person's, is returned as null. No personal data is stored.

Coverage & limits

All gTLDs (.com, .net, .org, .dev, .app, .xyz, .ai ...) and ccTLDs that publish RDAP (.uk, .fr, ...). Some ccTLDs (.de, .ru, .eu, .io) have no RDAP in the IANA bootstrap: you still get DNS records and registered inferred from NS (registeredSource: "dns"), with error: tld_not_in_rdap_bootstrap. Input expiringSoonDays (optional, default 30) sets the expiring_soon flag only; it does not drop rows. To return only expiring domains, use expiringWithinDays. Each RDAP server is rate-limited separately (default 1 request/s per server), Retry-After and 429/5xx are honored with exponential backoff.

Pricing

Pay per result: one charge per domain returned, plus a small per-run start fee. You can cap spend with "Max charge per run".

How to use the WHOIS domain lookup API

1. Open the Actor, fill in the input form (or paste the JSON below).
2. Click Start. Results land in the dataset as JSON, CSV, Excel or via the Apify API.
3. For alerts or regular refreshes, add an Apify Schedule. You can cap spend with "Max charge per run".

Input example

{
  "domains": [
    "apify.com",
    "https://www.bbc.co.uk/news",
    "nic.ai"
  ],
  "includeDns": true,
  "dnsRecordTypes": [
    "A",
    "MX",
    "NS",
    "TXT"
  ],
  "maxResults": 1000
}

Output example

{
  "domain": "github.com",
  "registered": true,
  "registrar": "MarkMonitor Inc.",
  "registrarIanaId": "292",
  "status": [
    "client delete prohibited"
  ],
  "createdAt": "2007-10-09T18:20:50Z",
  "expiresAt": "2026-10-09T18:20:50Z",
  "nameservers": [
    "dns1.p08.nsone.net"
  ],
  "dnssec": false,
  "days_until_expiry": 137,
  "expiring_soon": false,
  "registrar_abuse_email": "abusecomplaints@markmonitor.com",
  "dns": {
    "MX": [
      "..."
    ]
  }
}

Values above are illustrative; field names match the dataset schema.

FAQ

Is RDAP the same as WHOIS?

RDAP is ICANN's official replacement for WHOIS. It returns structured JSON from each registry instead of free-text WHOIS output.

Do you return registrant names or emails?

No. All registrant, admin, tech and billing contacts are dropped. Only the registrar company, its abuse-desk role address (registrar_abuse_email, abuse@-style only) and technical data remain.

Which TLDs are covered?

All gTLDs and ccTLDs that publish RDAP. Some ccTLDs (.de, .ru, .eu, .io) have no RDAP; for them you get DNS records and an inferred registered flag with an error note.

How much does it cost?

$2 per 1,000 domains plus $0.005 per run.

Are there limits I should know about?

Yes. Results are only as complete and current as the official source. If a source is down, the run logs the error instead of returning made-up data. Report problems in the Issues tab.

Use it from code, AI agents and automations

The same input as the form above works everywhere. Results are the run's dataset (JSON, CSV, Excel). You need an Apify API token (Console → Settings → API & Integrations).

Python (pip install apify-client)

from apify_client import ApifyClient

client = ApifyClient("<YOUR_APIFY_TOKEN>")
run = client.actor("stazis/domain-rdap-api").call(run_input={
  "domains": [
    "apify.com",
    "example.org",
    "bbc.co.uk"
  ]
})
for item in client.dataset(run.default_dataset_id).iterate_items():  # apify-client < 3: run["defaultDatasetId"]
    print(item)

JavaScript / TypeScript (npm i apify-client)

import { ApifyClient } from 'apify-client';

const client = new ApifyClient({ token: process.env.APIFY_TOKEN });
const run = await client.actor('stazis/domain-rdap-api').call({
  "domains": [
    "apify.com",
    "example.org",
    "bbc.co.uk"
  ]
});
const { items } = await client.dataset(run.defaultDatasetId).listItems();

HTTP, one call (waits for the run, up to 5 minutes, and returns the items)

curl -X POST "https://api.apify.com/v2/acts/stazis~domain-rdap-api/run-sync-get-dataset-items" \
  -H "Authorization: Bearer $APIFY_TOKEN" -H "Content-Type: application/json" \
  -d '{"domains": ["apify.com", "example.org", "bbc.co.uk"]}'

AI agents (MCP). This Actor runs with limited permissions, so AI agents can use it through the hosted Apify MCP server (Claude, Cursor, VS Code, Codex and other MCP clients). Add this to your MCP client config and sign in with Apify on first use:

{ "mcpServers": { "domain-rdap-api": { "url": "https://mcp.apify.com?tools=stazis/domain-rdap-api" } } }

Agents without an Apify account can pay per run in USDC through agi.apify.com (x402). Pricing is pay-per-event, so an agent pays only for the results it gets.

LangChain (pip install langchain-apify, set APIFY_TOKEN): from langchain_apify import ApifyActorsTool and tool = ApifyActorsTool("stazis/domain-rdap-api") gives your agent this Actor as a tool.

No-code and scheduling: use the Apify app in Make, n8n or Zapier ("Run an Actor", then pick stazis/domain-rdap-api), or create a Schedule in Apify Console to run it daily and send results to a webhook, Slack or Google Drive through Apify integrations.

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