Domain price comparison API

Q: In which order are registrars listed?

The registrars of our catalog in catalog order, then the others alphabetically. The answer is never sorted by price; a mark shows the cheapest first year.

Q: What is a renewal trap?

An ending whose cheapest first year's renewal is at least twice the first year and at least $10 more. GET /prices/traps lists them alphabetically: free calls read the rows the website shows, a key reads them all.

Compare what registrars charge for a domain ending as JSON: first year, renewal and transfer for each registrar, with the cheapest and the renewal traps marked. Free calls also read the renewal traps and the newest price changes.

Without a key: every registrar's price for an ending (one ending a day outside the endings with a page on the website), the renewal traps the website shows and the newest confirmed price changes.
With a key: the cheapest registrar for up to 100 endings at once, every renewal trap, the whole price change feed, and every stored price for one name.
Free calls need no key: 60 calls an hour and 100 a day from one address.

Try it

curl -X GET "https://api.unique.domains/v1/prices/tlds/io"

const response = await fetch("https://api.unique.domains/v1/prices/tlds/io", {
    method: "GET",
});

const data = await response.json();
console.log(data);

import requests

response = requests.get(
    "https://api.unique.domains/v1/prices/tlds/io",
)

print(response.json())

req, err := http.NewRequest("GET", "https://api.unique.domains/v1/prices/tlds/io", nil)
if err != nil {
    panic(err)
}

res, err := http.DefaultClient.Do(req)

$ch = curl_init();
curl_setopt_array($ch, [
    CURLOPT_URL => "https://api.unique.domains/v1/prices/tlds/io",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => "GET",
]);
$response = curl_exec($ch);

uri = URI("https://api.unique.domains/v1/prices/tlds/io")
request = Net::HTTP::Get.new(uri)

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }

200 · application/jsonExample

{
  "data": [
    {
      "registrar": "cloudflare",
      "name": "Cloudflare",
      "homepageUrl": "https://www.cloudflare.com/products/registrar/",
      "purchasePrice": 38.5,
      "renewalPrice": 38.5,
      "transferPrice": 38.5,
      "currency": "USD",
      "isPromo": false,
      "renewalTrap": false,
      "cheapest": true,
      "cheapestRenewal": true,
      "cheapestTransfer": true
    }
  ],
  "meta": {
    "asOf": "2026-11-05T08:00:00Z",
    "cursor": null,
    "limit": null
  },
  "links": {
    "self": "https://api.unique.domains/v1/prices/tlds/io",
    "next": null,
    "register": null,
    "product": null,
    "dataset": null
  }
}

Endpoints

GET/prices/tlds/{tld}Every registrar's list price for one ending, with the cheapest and trap marks.Free GET/prices/cheapestThe cheapest registrar per ending for up to 100 endings.Paid GET/prices/trapsEndings whose cheapest first year renews at a trap price, alphabetical.Free GET/prices/changesConfirmed registrar price changes across the nine, newest first.Free GET/names/{name}/pricesEvery stored registrar quote for one name, and the renewal-trap flag.Paid

Ways to call it

No keyThe call above runs from any language or tool, as it is.Read the endpoint reference

RapidAPIA paid subscription to this listing opens its paid endpoints.Domain Price Comparison API on RapidAPI

Node.jsnpm install @uniquedomains/registrar-pricesnpx @uniquedomains/registrar-prices io

Member keyThe Founder and Investor plans include a key of their own.Compare the two plans

Domain price comparison API questions

Contact me

In which order are registrars listed?

The registrarsRegistrarThe company you buy and renew a domain through, such as Namecheap or GoDaddy. It does not own the name, it only registers it for you.Read the definition of our catalog in catalog order, then the others alphabetically. The answer is never sorted by price; a mark shows the cheapest first year.

What is a renewal trap?

An ending whose cheapest first year's renewalRenewalThe yearly fee that keeps a domain yours. You pay it for as long as you hold the name, and on some endings it costs far more than the first year did.Read the definition is at least twice the first year and at least $10 more. GET /prices/traps lists them alphabetically: free calls read the rows the website shows, a key reads them all.

Does it show promotional prices?

Yes. A promotional first year shows as the price, marked as a promotion. The regular price behind it needs a key.