Domain Availability Checker API — Is This Domain Taken?

Description

Quickly determine whether a domain name is available for registration by checking DNS resolution and RDAP/WHOIS data. Faster than traditional WHOIS-only checks.

Use Cases

Domain name shopping — check availability before purchase
Brand protection — monitor if similar domains become available
Startup name brainstorming — quickly validate ideas

Parameters

Name	Type	Required	Description
`domain`	string	Yes	Domain name to check (e.g. example.com)
`format`	string	No	Response format: json or markdown

Example Request

bash

curl -H 'X-API-Key: YOUR_KEY' \
  'https://api.example.com/dns/available?domain=mybrand.com'

python

import httpx

resp = httpx.get(
    "https://api.example.com/dns/available?domain=mybrand.com",
    headers={"X-API-Key": "YOUR_KEY"},
)
print(resp.json())

javascript

const resp = await fetch("https://api.example.com/dns/available?domain=mybrand.com", {
  headers: { "X-API-Key": "YOUR_KEY" },
});
const data = await resp.json();
console.log(data);

Example Response

json

{
  "domain": "mybrand.com",
  "available": false,
  "method": "dns+rdap"
}

Domain Availability

Description

Use Cases

Parameters

Related Tools in Domain

WHOIS Lookup

Bulk WHOIS Lookup

Domain Age Checker

Bulk Domain Availability

TLD Search

Subdomain Discovery