Domain Availability

Overview

Domain Availability is a domain check API: pass one domain name and it reports whether the domain is available to register, plus its creation and expiry dates when it is already taken. It queries the registry over RDAP, falling back to WHOIS, at the time of the request. Paid plans also get the TLD's registration, renewal and transfer price range across registrars, refreshed weekly, and a flag for names the registry likely prices as premium.

Live Test Domain Availability API →

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

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

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const res = await fetch('https://api.apiverve.com/v1/domainavailability?domain=myspace.com', {
  headers: { 'x-api-key': 'your_api_key_here' },
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

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import requests

res = requests.get(
    "https://api.apiverve.com/v1/domainavailability?domain=myspace.com",
    headers={"x-api-key": "your_api_key_here"},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

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package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/domainavailability?domain=myspace.com", nil)
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

Parameters

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them.

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

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{
  "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",
    "pricing": {
      "tld": "com",
      "currency": "USD",
      "registration": {
        "low": 11.08,
        "high": 11.25
      },
      "renewal": {
        "low": 11.08,
        "high": 11.25
      },
      "transfer": {
        "low": 11.08,
        "high": 11.25
      },
      "sources": 2,
      "premiumLikely": null,
      "premiumReason": null,
      "updatedAt": "2026-10-18T10:00:00.000Z"
    }
  }
}

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.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Use cases

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.

Other ways to use Domain Availability

Set up Domain Availability on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Related

More in Domain Data: