@domainkits/sdk

@domainkits/sdk

TypeScript client for the DomainKits REST API.

DomainKits is one API with a shared key across every endpoint. This SDK covers all of them — six 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.expired.list({
  keyword: 'clinic',
  tld: 'com',
  length: '5-10',
  no_number: true,
  no_hyphen: true,
});

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

Paging

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

for await (const domain of dk.expired.paginate({ keyword: 'clinic', 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
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.

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' });
await dk.ctSearch({ keyword: 'example' });
await dk.tldTrends('newly', { tld: 'com' });
await dk.keywordTrends('hot');
await dk.usage();
await dk.searchStatus();

Coverage

gTLDs only for the 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, .io, .co or .us returns an empty result set, not an error.

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

License

MIT