1,000 free credits a month, no card

Domain API: Availability,
WHOIS and DNS in One Key

Query WHOIS, DNS records, SSL certificates, web metadata and email checks with one key. Pay per credit, start free.

Domain
DNS
Security
Identity
Start freeView pricing
api.domsdk.com

Is example.com free to register? If not, who holds it and when does it expire?

MCP client

Ran 3 DomSDK toolsok
Checked availability domain.availability200
Looked up WHOIS / RDAP whois.lookup200
Read DNS records dns.records200

example.com is registered, so it is not available. Here is what DomSDK returned:

taken

Availability

domain
example.com
available
false
tld
.com
RDAP

WHOIS

registrar
Example Registrar, Inc.
created
1995-08-14
expires
2027-08-13
NS / MX

DNS

NS
a.iana-servers.net
NS
b.iana-servers.net
MX
0 .

Sample response for illustration.

Introducing DomSDK

Everything about a domain, one request away. Stop stitching together five providers.

DomSDK is one key for all of it. Registration, DNS, certificate and reputation data behind one consistent JSON API, over plain REST or through our MCP server.

One catalog

Six suites,
behind one key.

Web Data, Domain Intelligence, DNS and Infrastructure, Security and Trust, Identity and Verification, Monitoring and Automation. One key, one JSON style, one credit balance.

Lookalike check: example.com
examp1e.comregistered
example-login.comregistered
exampel.comavailable
examplee.comavailable
example.cochecking

Brand protection. Find lookalike domains, read their WHOIS and DNS, and watch for new certificates on names that look like yours.

Availability
domsdk-demo.comavailable
domsdk-demo.ioavailable
domsdk-demo.devavailable
example.comtaken
example.orgtaken

Domain search. Check whether names are free across TLDs before you show them to a user, with registrar and age for the ones that are taken.

Watchlist
example.comSSL renews soon
example.netno change
example.orgNS changed
example.eduno change
example.infono change

Monitoring. Watch domains for DNS, WHOIS or certificate changes and get notified, instead of polling five providers yourself.

Domain Intelligence

REST API and MCP tools
WHOIS lookupwhois.lookup
RDAP recordswhois.rdap
Availabilitydomain.availability
Registrar and agedomain.registrar
Domain agedomain.age
All suites

DNS & Infrastructure

REST API and MCP tools
A and AAAAdns.records
MX recordsdns.mx
NS and CNAMEdns.ns
TXT recordsdns.txt
IP and hostingip.hosting
All suites

Security & Trust

REST API and MCP tools
SSL certificatessl.certificate
Certificate detailsssl.details
Certificate expiryssl.expiry
Blocklist statusreputation.blocklist
Lookalike domainsdomain.lookalikes
All suites

Web, Identity, Monitoring

REST API and MCP tools
Page metadataweb.meta
Page statusweb.status
Tech stack hintsweb.tech
Email checksemail.verify
Change monitoringmonitor.watch
All suites

Tool names shown are illustrative. See every suite or the WHOIS API and DNS Lookup API.

Fair credit pricing

The same credits,
about 30% less.

Every operation costs credits. Monthly plans start at $4.20, and credit packs never expire.

DomSDK Pro100,000 credits / month
$13.30
DomScan Propublished list price
$19.00

DomScan prices as read from domscan.net/pricing in November 2026. DomSDK is an independent service and is not affiliated with DomScan. Free plan: 1,000 credits a month on both. See every plan and pack.

RDAP first

Accounts reviewed by humans. Lookups that fall back.

We review every new account before enabling API access. It keeps abuse low and keys fast for everyone.

When a registry supports RDAP we use it, and fall back to classic WHOIS when it does not, so you always get the same JSON shape.

  1. Sign up with emailName, email and password. No social sign-in.
  2. We review your accountA person checks each new signup.
  3. Get your API keyWe email you when your key is ready.
Built for developers and AI agents

Give your agent domain and DNS tools.

Use plain REST from any language, or connect our MCP server so assistants like Claude and Cursor can look up domains on their own.

  • Domain availability and WHOIS
  • DNS records and hosting
  • SSL certificate checks
  • Email validation
Set up MCP
mcp.json
{
  "mcpServers": {
    "domsdk": {
      "url": "https://mcp.domsdk.com",
      "headers": { "Authorization": "Bearer YOUR_KEY" }
    }
  }
}
FAQ

Questions, answered.

What is a credit?

Each API or MCP operation costs a set number of credits. Simple lookups cost less than heavier checks.

Is there a free plan?

Yes. 1,000 credits every month, no card needed.

Do credit packs expire?

No. Pack credits stay on your account until used.

Why is my account in review?

We check every signup by hand before enabling API access to prevent abuse.

Can I sign up with Google?

No. We use email signup only.

How does pricing compare to DomScan?

Our list prices are about 30% lower. We are an independent service, not affiliated with DomScan.

Get 1,000 free credits a month.

Email signup, human review, then one key for every suite.

Create account