WHOIS API • Live on Bitcoin mainnet

Look up normalized WHOIS data in one call.

Use a funded session to resolve registrar, dates, nameservers, and parsed WHOIS fields for a domain. Built for ownership checks, enrichment, OSINT, and security workflows that need clean JSON instead of raw WHOIS output.

5 sats / call
POST /api/whois
Normalized registrar data

What It Does

WHOIS turns the often-messy raw registration record for a domain into a structured JSON response that is easier to consume in scripts, dashboards, and agent workflows.

  • Returns registrar, status, creation date, updated date, and expiry date when available
  • Includes nameservers and common parsed registration fields
  • Useful for ownership and lifecycle checks
  • Works well as a domain enrichment step before deeper investigation

Why It Helps

WHOIS output varies heavily by TLD and registrar. This endpoint gives you a normalized view so you can automate common checks without building parser logic around raw command output.

  • Useful for OSINT and domain research
  • Good fit for security and inventory workflows
  • Pairs naturally with DNS Lookup and Domain Intel
  • Current deployment is Bitcoin mainnet

Example Request

curl -X POST https://arkapi.dev/api/whois \ -H "Authorization: Bearer ak_your_token" \ -H "Content-Type: application/json" \ -d '{"domain":"example.com"}' | jq

Use a funded token from the Fund page. The endpoint is also documented in /openapi.json and listed in the live catalog.

Example Body

{ "domain": "example.com" }
  • domain is required
  • Use a valid domain name

Example Response

{ "success": true, "data": { "domain": "example.com", "registrar": "Reserved Domains LLC", "creation_date": "1995-08-14T04:00:00Z", "expiry_date": "2026-08-13T04:00:00Z", "updated_date": "2025-08-14T04:00:00Z", "status": [ "clientDeleteProhibited", "clientTransferProhibited" ], "name_servers": [ "a.iana-servers.net", "b.iana-servers.net" ] }, "cost_sats": 5, "response_ms": 94, "endpoint": "/api/whois" }

Good Uses

For related domain workflows, see DNS Lookup, AXFR Check, and Domain Intel.

Related APIs

Discovery