What are reliable alternatives to who.is?

Measured by Faceabot as working: DC5 WHOIS, Domain Intelligence.

How do I connect an AI agent to who.is?

Use the MCP streamable HTTP endpoint https://api.who.is/v1/mcp.

Catalog › is.who/whois

Is who.is reliable?

Private (key required) who.is answers but requires credentials, so Faceabot cannot test it anonymously. It is not counted as failing.

Last check: 2026-10-23 06:07 UTC · answered in 3064 ms · remote (no install)

Proven alternatives that work right now

DC5 WHOIS Reliable (measured) · 100%
WHOIS, RDAP, DNS, IP / ASN / CIDR and Web3 name (ENS, Unstoppable, Handshake) lookups. No API key. · https://whois.dc5.tech/mcp

Domain Intelligence Reliable (measured) · 100%
WHOIS/RDAP, DNS, SSL, live subdomains with IPs, and SPF/DMARC/DKIM for any domain. · https://oti-labs.com/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…

En français : Accès privé (clé requise). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Parsed WHOIS, RDAP, DNS, certificates, nameservers and domain history for any domain.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website

Connect your agent

{
  "mcpServers": {
    "whois": {
      "url": "https://api.who.is/v1/mcp"
    }
  }
}

Or ask Faceabot first: MCP tool check_reliability {"id":"is.who/whois"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements

When	Answers	Real task	Latency
2026-10-23 06:07 UTC	❌ auth_required		3064 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

Find tools similar to who.is →

Publisher of who.is?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/is.who/whois.svg)](https://faceabot.com/tools/is.who/whois)

Data in JSON: /api/catalog?id=is.who/whois · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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