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Claude, Codex & Co. verwalten DNS, Domains und Zertifikate direkt, inklusive DNS-Doktor-Diagnosen.

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DNS API-Referenz
v1.6.2
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Check domain availability
Check whether a domain is still registrable. Answered from the regfish lookup service (RDAP/WHOIS against the registries) — the same source that powers the domain search on regfish.de, not the account database. This endpoint deliberately works on any domain, not just the ones in the account: the whole point is to ask about domains nobody owns yet. A check that cannot be completed (registry unreachable, timeout) returns 502 rather than reporting the domain as taken — guessing here would cost the customer a registration. Rate limit: 60 checks per minute and API key.
GET
/domains/availability/{domain}
Domains

Authentifizierung

x-api-key

Parameter

Name
Typ
Format
Pflicht
Description
domain
path
string
-
Pflicht
A domain name to check. Unlike `fqdn_relaxed` this also accepts internationalised names (e.g. `müller-shop.de`); they are converted to punycode and validated against the public suffix list server-side.

Request-Beispiel

GET
curl --request GET \
  --url 'https://api.regfish.com/domains/availability/example.de' \
  --header 'x-api-key: YOUR_API_KEY'

Responses

200
Availability result
Response-Beispiel 200
{
  "success": true,
  "code": 0,
  "response": {
    "domain": "example",
    "sld": "example",
    "tld": "example",
    "available": true,
    "status": "available",
    "flags": [
      "example"
    ]
  }
}
400
Not a valid registrable domain name
application/jsonError
Response-Beispiel 400
{
  "success": false,
  "message": "Not a valid registrable domain name",
  "error": "Not a valid registrable domain name"
}
401
Unauthorized
application/jsonError
Response-Beispiel 401
{
  "success": false,
  "message": "Unauthorized",
  "error": "Unauthorized"
}
429
Too many availability checks
application/jsonError
Response-Beispiel 429
{
  "success": false,
  "message": "Too many availability checks",
  "error": "Too many availability checks"
}
500
Unexpected error
application/jsonError
Response-Beispiel 500
{
  "success": false,
  "message": "Unexpected error",
  "error": "Unexpected error"
}
502
Availability could not be determined
application/jsonError
Response-Beispiel 502
{
  "success": false,
  "message": "Availability could not be determined",
  "error": "Availability could not be determined"
}
Verwandte Modelle
Community

Werde ein Teil der Community

Das DNS API von Regfish ist die perfekte Lösung für Entwickler, die ihre Domains und DNS-Zonen automatisieren möchten. Werde Teil der Community und profitiere von den Vorteilen der DNS-Automatisierung. Das DNS API steht jedem Regfish-Kunden kostenlos zur Verfügung.