Domain Availability API

GET

See whether any domain name is taken or free to register.

Domain Availability checks domain availability in real time to show if a web address is open for registration or already taken. Get creation and expiration dates for taken domains, while paid plans add registrar details.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/domainavailability?domain=myspace.com

Query parameters

domainstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "domain": "myspace.com",
    "available": false,
    "owner": {
      "registrar": "GoDaddy.com, LLC",
      "createdDate": "1996-02-22T05:00:00Z",
      "expiryDate": "2029-02-23T05:00:00Z"
    },
    "source": "rdap"
  }
}

About the Domain Availability API

Domain Availability Checker works by analyzing the domain provided and checking if it is available. It uses advanced algorithms to check the availability of the domain and returns if the domain is available or not.

What people use it for

Business Name Generators: When entrepreneurs test company names, business formation apps verify if matching dot-com addresses are unregistered before finalizing entity paperwork.
Domain Reseller Storefronts: Show buyers instant availability flags and registration expiry dates directly inside custom search bars for registrar and web hosting portals.
Trademark Defense Audits: Legal teams scan potential brand collisions across key top-level domains, inspecting registration dates to establish prior use or bad-faith squatting.
Agency Rebranding Workflows: Filter out claimed domains early during client naming sprints so design studios pitch only project handles that can actually be acquired.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use Domain Availability

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext

Questions.

Common questions about the Domain Availability API.

Read the docs →

Which plan fits 10,000 domain checks a month?

The Starter plan easily covers that volume. Each check consumes 10 credits, which works out to about $1.50 per 1,000 checks on Starter, giving you 20,000 checks each month. The Free plan includes 20 checks per month for testing.

Do I get the current registrar details on the Free plan?

No. The registrar company managing a registered domain is a premium field reserved for paid tiers. Upgrading to Starter, Pro, or Mega unlocks registrar data alongside the availability status.

Are domain availability checks performed in real time?

Yes. The Domain Availability API checks domain registration status in real time on every request to reflect current registry state rather than returning stale cached results.

What does the API return if a domain is unregistered?

The available field returns true, and on paid plans, the owner registrar field will not contain registrar information since no organization currently holds the domain.

Can I display domain availability results in my own commercial product?

Yes, as long as you are on any paid plan. You can use the availability status and registrar information inside your own customer-facing apps, but you may not resell or redistribute the raw API response as-is.

Request parameters — GET /v1/domainavailability

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`domain`Required	string	`myspace.com`	The domain to check if it is available domain

Example request

1
2

curl "https://api.apiverve.com/v1/domainavailability?domain=myspace.com" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — GET /v1/domainavailability

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "domain": "myspace.com",
    "available": false,
    "owner": {
      "registrar": "GoDaddy.com, LLC",
      "createdDate": "1996-02-22T05:00:00Z",
      "expiryDate": "2029-02-23T05:00:00Z"
    },
    "source": "rdap"
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`domain`	string	`"myspace.com"`	The domain name that was checked for availability
`available`	boolean	`false`	Whether the domain is available for registration
`owner`	object	`{...}`	Registration details for a taken domain; null when the domain is available
`registrar`Premium	string	`"GoDaddy.com, LLC"`	The registrar company managing the domain registration
`createdDate`	string	`"1996-02-22T05:00:00Z"`	When the domain was first registered (ISO 8601)
`expiryDate`	string	`"2029-02-23T05:00:00Z"`	When the current registration expires (ISO 8601)
`source`	string	`"rdap"`	Which lookup answered: rdap, whois, rdap_proxy, whois_proxy, or cache

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 10 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	Domain Availability calls	Per 1,000 calls
Free	Free	200	20	Free
Starter	$29.99	200,000	20,000	$1.50
Pro	$99.99	1,000,000	100,000	$1.00
Mega	$299.99	4,000,000	400,000	$0.75

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — GET /v1/domainavailability

No SDK to install — this is a plain HTTPS call to /v1/domainavailability with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/domainavailability" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/domainavailability-apiSource, issues and the examples this page is built from.ReferenceDomain Availability API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/domainavailabilitynpm apiverve-domainavailabilityPyPI APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — GET /v1/domainavailability

Install the Node.js SDK, then call the Domain Availability API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/domainavailability

Node.js

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

Resources

npm@apiverve/domainavailabilityThe published Node.js client, versioned and signed.GitHubapiverve/domainavailability-apiSource, issues and the examples this page is built from.ReferenceDomain Availability API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

apiverve-domainavailabilityPyPI APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — GET /v1/domainavailability

Install the Python SDK, then call the Domain Availability API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-domainavailability

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/domainavailability",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

PyPIapiverve-domainavailabilityThe published Python client, versioned and signed.GitHubapiverve/domainavailability-apiSource, issues and the examples this page is built from.ReferenceDomain Availability API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/domainavailabilitynpm APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — GET /v1/domainavailability

Install the C# / .NET SDK, then call the Domain Availability API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.DomainAvailability

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/domainavailability");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.DomainAvailabilityThe published C# / .NET client, versioned and signed.GitHubapiverve/domainavailability-apiSource, issues and the examples this page is built from.ReferenceDomain Availability API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/domainavailabilitynpm apiverve-domainavailabilityPyPI

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — GET /v1/domainavailability

No SDK to install — this is a plain HTTPS call to /v1/domainavailability with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/domainavailability", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/domainavailabilitynpm apiverve-domainavailabilityPyPI APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — GET /v1/domainavailability

No SDK to install — this is a plain HTTPS call to /v1/domainavailability with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/domainavailability");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/domainavailabilitynpm apiverve-domainavailabilityPyPI APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — GET /v1/domainavailability

No SDK to install — this is a plain HTTPS call to /v1/domainavailability with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/domainavailability")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/domainavailabilitynpm apiverve-domainavailabilityPyPI APIVerve.API.DomainAvailabilityNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

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Domain Availability API

Try it — live request, no key required

About the Domain Availability API

What people use it for

Ways to call it

Other ways to use Domain Availability

Questions.

Request parameters — GET /v1/domainavailability

Required

Authentication

Response — GET /v1/domainavailability

Response fields

Response headers

Errors

What a call costs — 10 credits per call

Call it from cURL — GET /v1/domainavailability

Resources

Also published for

Call it from Node.js — GET /v1/domainavailability

Resources

Also published for

Call it from Python — GET /v1/domainavailability

Resources

Also published for

Call it from C# / .NET — GET /v1/domainavailability

Resources

Also published for

Call it from Go — GET /v1/domainavailability

Resources

Also published for

Call it from PHP — GET /v1/domainavailability

Resources

Also published for

Call it from Ruby — GET /v1/domainavailability

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Domain Availability API

Domain Data

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