@domainkits/sdk

@domainkits/sdk

TypeScript client for the DomainKits REST API.

This is the official TypeScript SDK for the DomainKits API, published and maintained by the DomainKits team. DomainKits is built and operated by Lyalpha GmbH, with domain data and infrastructure provided by ABTdomain, our domain intelligence and data aggregation platform. This repository is hosted under the ABTdomain GitHub organisation. Learn more about the relationship at domainkits.com/about.

DomainKits is one API with a shared key across every endpoint. This SDK covers all of them (seven domain search types, WHOIS, DNS, reverse nameserver, Certificate Transparency, safety, trends and bulk download) with typed parameters and responses, automatic paging, and structured quota errors.

Requirements

The REST API is for Premium and Platinum accounts; unauthenticated requests are rejected with 401. Keys start with dk_ and come from domainkits.com.

If you want a no-key way to explore the same data from an AI client, use @domainkits/mcp instead, which has a guest tier.

Install

npm install @domainkits/sdk

Usage

import { DomainKits } from '@domainkits/sdk';

const dk = new DomainKits(process.env.DOMAINKITS_API_KEY!);

const { data, total } = await dk.nrds.list({
  keyword: 'shop',
  tld: 'com',
  reg_date: '2026-07-10',
  no_number: true,
  no_hyphen: true,
});

console.log(`${total} matches`);
for (const d of data) {
  console.log(d.domain, d.registered_date, d.expiry_date);
}

Paging

A single request returns at most 500 results. paginate walks the whole result set for you:

for await (const domain of dk.nrds.paginate({ keyword: 'shop', tld: 'com' })) {
  console.log(domain.domain);
}

It stops when the result set is exhausted. Break out of the loop whenever you have enough, no further requests are made.

Export

export pulls up to 50,000 rows as CSV in one request:

const csv = await dk.expired.export({ tld: 'com', status: 'pending_delete' });

This runs on a separate, much smaller quota: 10 per day and 100 per month on Premium, 3 and 9 during the trial. It is for occasional bulk pulls, not for a scheduled job. The export also returns fewer columns than paged mode: registered_date is the year only, and age is omitted.

50,000 is a cap, not a promise of completeness. Browsing .com matched 4,847,613 expiring domains on 27 July 2026, so an unfiltered export returns the first 50,000. Narrow the query if you need the result set to fit.

Search types

Method	What it searches
dk.expired	Domains in the deletion cycle: expired, redemption, pending delete
dk.nrds	Newly registered domains, last 60 days, from the zone files
dk.nrdsLive	Newly registered domains, last 3 days, from Certificate Transparency
dk.aged	Domains with 5 to 20+ years of registration history
dk.active	Currently registered domains
dk.deleted	Dropped domains (requires keyword)
dk.market	Domains listed for sale on marketplaces

Each has list, paginate and export, and its own parameter and result types: an expired result carries status, an NRD result carries expiry_date, a market result carries marketplace.

Filter notes

length and age_range accept a preset band (5-10), an exact value (10), or a range (8-12, inclusive of both ends). age_range also takes a comma-separated list (0-5,20+).

new takes 1, 2 or 3 and restricts results to the last N observed days: on expired the domains that entered the expired pool (expired stage only), on deleted the domains that dropped, on market the listings that first appeared on a marketplace.

reg_date on nrds accepts a day (2026-07-10), a month (2026-07), a year (2026), or a from:to range where either side may be omitted.

position defaults to contain everywhere except market, which defaults to start; pass contain there to match anywhere in the name.

nrds and nrdsLive

Two registration feeds, read from different places, so they answer different questions.

nrds reads the zone files and holds 60 days. It is the complete view for the generic TLDs and the one to use for anything that looks back more than a few days.

nrdsLive reads Certificate Transparency and holds 3 days. A name reaches it once a certificate is issued, which can be before the zone files carry it, so it surfaces names nrds cannot show yet. It also reaches .ai and .io, which the zone based feeds do not carry. A row carries tld rather than tld_count, and the endpoint runs on a smaller per-minute quota than nrds.

Other endpoints

await dk.whois('example.com');
await dk.dns('example.com');
await dk.safety('example.com');
await dk.nsReverse({ ns: 'ns1.example.com', tld: 'com' });
await dk.tldCheck({ prefix: 'yourbrand' });
await dk.typosquat({ domain: 'example.com' });
await dk.ipLookup('8.8.8.8');
await dk.registrar('godaddy');
await dk.statusGuide('clientHold');
await dk.monitorChanges({ tld: 'com', reason: 'transfer' });
await dk.ctSubdomains('example.com');
await dk.ctCerts({ domain: 'example.com', after: '2026-08-01', scope: 'all' });
await dk.ctSearch({ keyword: 'example', field: 'sld', sort: 'newest' });
await dk.tldTrends('newly', { tld: 'com' });
await dk.keywordTrends('hot');
await dk.usage();
await dk.searchStatus();

Certificate Transparency notes

ctSubdomains, ctCerts and ctSearch share after, before, scope, sort, issuer, cert_type and limit.

scope decides how far back the read goes. valid covers the running half year and answers quickly; all reaches back to 2020 and costs more time. after and before take YYYY-MM-DD and filter on log time, so a date window is a better way to ask for recent activity than relying on the result order.

field on ctSearch decides where the keyword has to appear. reg matches the registered domain and returns every hostname under it, so one busy site can fill the result set. sld matches the subdomain label only, which skips those and leaves the cases where the keyword sits in front of an unrelated registration. domain matches anywhere in the full hostname.

Coverage

gTLDs only for the zone based domain search endpoints. The index covers generic TLDs: .com, .net, .org, .info, .biz, .xyz, .online, .site, .top, .club, .live, .app, .dev and others. Country-code TLDs are not indexed: a query for .de, .co or .us returns an empty result set, not an error. nrdsLive is the exception and also carries .ai and .io.

whois, dns, safety, ipLookup and the Certificate Transparency endpoints work on any domain, ccTLDs included.

No PII. Responses contain no personal data. WHOIS results are limited to registrar, dates, status codes and nameservers; registrant names, emails, addresses and phone numbers are not returned.

Errors

import { RateLimitError, AuthError, DomainKitsError } from '@domainkits/sdk';

try {
  await dk.expired.export({ tld: 'com' });
} catch (error) {
  if (error instanceof RateLimitError) {
    console.log(`Quota exhausted. Retry in ${error.retryAfterMs}ms`);
    console.log(error.rateLimit);
  } else if (error instanceof AuthError) {
    console.log('Key rejected, check your plan tier');
  } else if (error instanceof DomainKitsError) {
    console.log(error.status, error.message);
  }
}

Every error carries the x-ratelimit-limit, x-ratelimit-remaining and x-ratelimit-reset values as a parsed rateLimit object. RateLimitError.retryAfterMs tells you how long until the window resets.

429 and 5xx responses are retried automatically, twice by default, waiting until the rate-limit window resets when that is under two minutes. Set maxRetries: 0 to handle it yourself.

Options

const dk = new DomainKits({
  apiKey: process.env.DOMAINKITS_API_KEY!,
  timeoutMs: 60_000,
  maxRetries: 2,
  baseUrl: 'https://premium-api.domainkits.com/api/v1',
});

Quotas

Call usage() for the live picture on your account: every endpoint reports its own per-minute, daily and monthly allowance alongside what you have already spent.

Daily quotas reset at 00:00 UTC, monthly quotas on the 1st. Current limits: domainkits.com/dev/api-docs.

Resources

• DomainKits API reference
• @domainkits/mcp, same API for MCP clients
• n8n-nodes-domainkits, same API for n8n
• About DomainKits and ABTdomain
• ABTdomain

License

MIT