rdap.domain

stable Standard

RDAP registration data for a domain: registrar, dates, name servers, DNSSEC (via the rdap.org bootstrap).

GET /v1/rdap/domain

What you get#

One Rdap record in Onekey's unified shape, in data. If the record does not exist you get a 404 not_found and are not charged.

What it costs#

Standard · 1 credit for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`domain`	string	yes	(required)	Domain name	max 253 chars; must match `(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+(?:xn--[a-z0-9-]{2,59}\|[a-z]{2,63})`; trimmed, lowercased

Request#

curl "https://api.onekey.dev/v1/rdap/domain?domain=example.com" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Rdap response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": {
    "entity": {
      "name": "example.com",
      "status": [
        "client delete prohibited",
        "client transfer prohibited",
        "client update prohibited"
      ],
      "createdAt": "1995-08-14T04:00:00Z",
      "updatedAt": "2026-08-14T08:01:43Z"
    },
    "ext": {
      "registrar": "RESERVED-Internet Assigned Numbers Authority",
      "registrarIanaId": "376",
      "expiresAt": "2027-08-13T04:00:00Z",
      "nameservers": [
        "elliott.ns.cloudflare.com",
        "hera.ns.cloudflare.com"
      ],
      "dnssecSigned": true,
      "handle": "2336799_DOMAIN_COM-VRSN"
    },
    "listing": {
      "company": null
    }
  },
  "metadata": {
    "platform": "rdap",
    "endpoint": "domain",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 1,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`name`	`entity.name`	-
`registrar`	`ext.registrar`	-
`registrarIanaId`	`ext.registrarIanaId`	-
`expiresAt`	`ext.expiresAt`	`toIsoDate`
`nameservers`	`ext.nameservers`	-
`dnssecSigned`	`ext.dnssecSigned`	`toBoolean`
`handle`	`ext.handle`	-
`status`	`entity.status`	-
`registeredAt`	`entity.createdAt`	`toIsoDate`
`updatedAt`	`entity.updatedAt`	`toIsoDate`
`organization`	`listing.company`	-

Caching and freshness#

Fresh for about 1 hour. Repeat calls in that window are served from cache and are free.
Between 1 hour and 1 day the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 1 day more (marked stale).
A "not found" is remembered for 5 minutes and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	That record does not exist. Free; do not retry.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).