Domain WHOIS / RDAP API

The Domain WHOIS / RDAP API returns a normalized domain ownership and registration summary. Use it when you need registrar and registration context for investigations, fraud checks, or abuse triage.

An active workspace API key and any Suite or Lookups plan are required. Each request consumes one shared lookup unit. See Authorization for limits and errors.

Endpoint

GET https://api.requestguard.com/v1/domain/{domain}/rdap

Parameters

Parameter	Type	Required	Description
domain	string	Yes	Domain name to query, such as example.com.

Example Request

curl "https://api.requestguard.com/v1/domain/example.com/rdap" \
  -H "Authorization: Bearer rg_sk_live_..."

Example Response

{
  "type": "domain",
  "domain": "example.com",
  "tld": "com",
  "registrar": "Example Registrar",
  "domain_age_days": 11234,
  "status": "active",
  "risk": {
    "suspicious_tld": false,
    "newly_registered": false,
    "threat_list_match": false,
    "typosquatting_risk": false
  },
  "lookup": {
    "method": "heuristic",
    "fallback_used": false,
    "confidence": 0.68
  },
  "sources": [
    {
      "name": "Domain registration lookup",
      "type": "rdap",
      "matched": true,
      "category": "registration"
    },
    {
      "name": "Domain heuristic",
      "type": "heuristic",
      "matched": false,
      "category": "domain_risk"
    }
  ]
}

Response Fields

Field	Meaning
type	Always domain for this endpoint.
domain	Queried domain.
tld	Top-level domain.
registrar	Registrar name when known.
domain_age_days	Approximate registration age when known.
status	Normalized registration status.
risk	Registration and reputation risk flags.
lookup	Lookup method, fallback flag, and confidence metadata.
sources	Source metadata used to build the response.

Related

• Domain Intelligence
• Abuse Contacts