PaidRegistrar Prices API

List TLD price history

GET/prices/tlds/{tld}/historyMember key

Change-only price rows of one ending, newest first.

From TldPriceHistory, keyset on (firstSeenAt, id), optionally for one registrar.

AccessA member key (Founder or Investor) or a paid RapidAPI subscription to this API.

BillingOne call.

PlanInvestor plan. A Founder key answers 403 plan_required.

FormatsJSON, CSV (.csv)

Keep a key on a server: a page a visitor loads shows it to everyone.

Connect on RapidAPI

Request

tldstringRequiredPath

The ending without the dot (ai); lowercased, a leading dot stripped.

registrarstringOptionalQuery

A registrar catalog slug.

limitintegerOptionalQuery

Rows a page: 20 by default, at most 20 without a key and 100 with a paid subscription; a larger value is clamped.

cursorstringOptionalQuery

The meta.cursor of the previous page; the last page answers null.

fieldsstringOptionalQuery

Comma-separated top-level keys to keep; an unknown key answers 400 unsupported_field.

curl -X GET "https://api.unique.domains/v1/prices/tlds/io/history" \
  -H "Authorization: Bearer YOUR_MEMBER_KEY"

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

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

import requests

response = requests.get(
    "https://api.unique.domains/v1/prices/tlds/io/history",
    headers={
        "Authorization": "Bearer YOUR_MEMBER_KEY",
    },
)

print(response.json())

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

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

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

uri = URI("https://api.unique.domains/v1/prices/tlds/io/history")
request = Net::HTTP::Get.new(uri)
request["Authorization"] = "Bearer YOUR_MEMBER_KEY"

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

Response

registrarstring

currencystring

purchasePricenumber

regularPurchasePricenumber

renewalPricenumber

transferPricenumber

isPromoboolean

firstSeenAtstring

First observation of this price set.

lastSeenAtstring

Last observation.

observationsinteger

Reads that saw it.

Errors

keyed_only403

A paid subscription is required

not_found404

Not found

rate_limited429

Too many requests

internal500

Unexpected error

200 · application/jsonExample

{
  "data": [
    {
      "registrar": "namecheap",
      "currency": "USD",
      "purchasePrice": 34.98,
      "regularPurchasePrice": null,
      "renewalPrice": 59.98,
      "transferPrice": 54.98,
      "isPromo": false,
      "firstSeenAt": "2026-11-03T05:40:00.000Z",
      "lastSeenAt": "2026-11-05T05:41:00.000Z",
      "observations": 3
    }
  ],
  "meta": {
    "asOf": "2026-11-05T08:00:00Z",
    "cursor": null,
    "limit": 20
  },
  "links": {
    "self": "https://api.unique.domains/v1/prices/tlds/io/history",
    "next": null,
    "register": null,
    "product": null,
    "dataset": null
  }
}

List TLD price history

Request

Response

Errors

Related endpoints