Domain Availability Checker

Domain	Availability	Price	Type

A small tool by dantonio.info that queries the AWS Route 53 Domains API to check availability and registration prices.

I built this after another domain-check service appeared to front-run a domain I'd queried. This one runs on AWS Route 53 and won't. Read why →

Rate limit: 10 requests per minute per IP. Results are cached for 24 hours. Need more? Email me and I'll bump your limit or whitelist you.

Show API docs ↓

Single endpoint. POST JSON, get JSON back.

POST https://domains.dantonio.info/api/check.php
Content-Type: application/json

{"domain": "example.com"}

curl:

curl -X POST https://domains.dantonio.info/api/check.php \
  -H 'Content-Type: application/json' \
  -d '{"domain": "example.com"}'

Response:

{
  "success": true,
  "query": "example.com",
  "cached": false,
  "results": [
    {
      "domain": "example.com",
      "availability": "UNAVAILABLE",
      "type": "queried",
      "price": "$13.00"
    },
    {
      "domain": "example.net",
      "availability": "AVAILABLE",
      "type": "suggestion",
      "price": "$11.00"
    }
  ]
}

Errors return {"success": false, "error": "..."} with status 400 (bad input), 405 (wrong method), 429 (rate limited), or 500 (upstream AWS error). On 429, the error message includes a retry-after hint.