Complete Domain Intelligence Suite

Domain Availability API.

Check domain name availability instantly across 1,500+ TLDs. Get alternative domain suggestions, premium domain detection, and registrar information. Perfect for domain marketplaces and registration platforms.

Get your free API key Read the docs

Free tier, no card< 200ms responses99.9% uptime SLA

GET/v1/domainavailabilitylive

query

Response200 OK · sample

{
  "status": "ok",
  "error": null,
  "data": {
    "domain": "myspace.com",
    "available": false,
    "owner": {
      "registrar": "GoDaddy.com, LLC"
    }
  }
}

Sample response · verify to run one live call, no signup

How it works

Domain Availability API

Instant domain availability checking
Comprehensive WHOIS data retrieval
Domain expiration monitoring and alerts
SSL certificate verification

1
Send one request
A single authenticated GET with the location you care about — no SDK required.
```
GET /v1/domainavailability?query=…
x-api-key: your_key
```
2
We do the aggregation
Each request pulls from multiple upstream sources and computes the derived fields for you.
3
Get clean JSON back
One structured object, typically under 200 ms — ready to render.
```
{ domain, available, owner, … }
```

The response

Everything in a single call.

/v1/domainavailabilityapplication/json

domain"myspace.com"

availablefalse

ownerregistrar

Use cases

What developers build with it.

Real applications shipping on this endpoint today — each with the numbers that made it worth wiring up.

See every use case

Domain Search for Registration Platforms

Our Domain Availability API checks domain availability in under 500ms across 1,500+ TLDs. Get premium domain detection, registrar info, and alternative suggestions in a single call.

Sub-500ms availability checksSupport for 1,500+ TLDsPremium domain detection

25% higherconversion on domain search

< 500msaverage response time

1,500+ TLDssupported worldwide

Domain Checks for Brand Name Generators

Integrate our API to show domain availability alongside each generated name. Check multiple TLDs simultaneously and surface the best available options for each brand idea.

Real-time domain availabilityCheck multiple TLDs per nameFilter suggestions by availability

3x moreuser engagement with tools

60% fasterthan manual domain checks

Domain Expiration Monitoring

Use our WHOIS and Domain Expiration APIs to monitor domains you own or want to acquire. Get expiration dates, registrar info, and set up alerts for approaching expiration dates.

Track expiration dates automaticallyMonitor competitor domainsCatch expiring domains for acquisition

Prevent $10K+in lost domain value

30 day warningbefore expiration

Acquire 5x moreexpiring domains

Start coding

Call it in your language.

Copy a working request, or install a typed SDK. Same endpoint, same key.

const res = await fetch("https://api.apiverve.com/v1/domainavailability?domain=myspace.com", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Included in your key

One subscription, the whole complete domain intelligence suite stack.

Every related API ships with your key — no separate plans, no extra keys, one bill.

See pricing

8APIs in this bundle

99.9%uptime SLA

The bundle

domainavailabilityYou’re herewhoislookup domainexpiration dnslookup sslchecker nameservers subdomainfinder mxlookup

No code required

Wire it into the tools you already run.

Ready-made recipes for Zapier, Make, and n8n — trigger on an event, and the data lands where your team works.

Google Sheets

Log domain availability checks to a sheet

WhenNew row added with domain name

ThenCheck domain availability → update row with result

Slack

Alert team when a domain becomes available

WhenScheduled check (e.g. hourly)

ThenCheck domain → post alert if available

Airtable

Track domain availability in your CRM

WhenNew record created

ThenCheck domain availability → populate fields

Notion

Enrich a domain research database

WhenNew database item created

ThenCheck domain → update properties

Salesforce

Verify lead domains on creation

WhenNew lead created

ThenCheck domain → update custom field

GitHub

Check project domain availability on new issues

WhenNew issue opened

ThenCheck domain → add comment with result

Browse all integrations

Learn

Understand the data behind the API.

Understanding the Domain Name System

How DNS works and why it matters for your applications.

WHOIS Data and Domain Registration

Understanding WHOIS records and domain ownership information.

Domain Availability and Registration

How to check domain availability and understand TLD options.

Questions about the API

How fast is domain availability checking?

Our availability checks complete in under 500ms for most TLDs. We query registrar databases directly for accurate, real-time results.

What WHOIS data do you provide?

We return registrant info (where available), registrar, nameservers, creation date, expiration date, and domain status.

Can I monitor domains for expiration?

Yes! Set up domain expiration monitoring and receive alerts when domains you're tracking are about to expire.

Which TLDs are supported?

We support 1,500+ TLDs including all major extensions (.com, .org, .net) and country-code TLDs.

Can I try domain lookups for free?

Yes, our free tier is great for building and testing your domain tools. Upgrade when you're ready to offer domain search at scale.

How is WHOIS data affected by GDPR?

GDPR requires redaction of personal registrant data for many TLDs. However, registrar information, nameservers, creation/expiration dates, and domain status remain publicly accessible.

What are the rate limits?

Rate limits vary by plan. Check our pricing page for details. Our plans are designed to support domain research and monitoring tools with generous limits.

Can I check multiple domains at once?

Yes! You can check multiple domains in parallel using concurrent API requests. Bulk checking is supported on all paid plans for efficient domain research.

What happens when a domain is taken?

When a domain is unavailable, the API returns the current registrar information so you can see who manages the domain.

What DNS record types can I lookup?

Our DNS Lookup API supports all major record types including A, AAAA, MX, TXT, CNAME, NS, SOA, PTR, and more for comprehensive DNS analysis.