WhoisJSON MCP Server

by whoisjson Your server? Claim it

local only

WhoisJSON runs on your own machine — the client starts it, so there is no endpoint to ping. 54 installs a week from npm. Last commit 9 Apr 2026.

WHOIS, DNS, SSL, and domain availability lookups for AI assistants

Installs per day peak 28 · avg 7 · +107% w/w

a month agotoday

Installs / week

npm · @whoisjson/mcp-server

Stars

0 open issues

9 Apr 2026

Last commit

0 releases in 90 days

—

License

TypeScript

Nothing serious here today

Today is the operative word: we check WhoisJSON every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp-server -- npx -y @whoisjson/mcp-server

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-server": {
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcp-server]
command = "npx"
args = ["-y", "@whoisjson/mcp-server"]

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: WHOISJSON_API_KEY (Your WhoisJSON API key from whoisjson.com/dashboard). The author declared them in the registry entry; get the values from the project itself.

Alternatives to WhoisJSON

same job, measured the same way

Domain Checker MCP

by wearebravelabs

Fast domain availability checker. DNS + RDAP/WHOIS verification.

32 installs/wk local only

42min

by 42min

Scheduling for AI assistants: bookings, availability, meeting polls and routing forms.

answering

Name.ai MCP Server

by name

Domain availability search, WHOIS lookup, TLD pricing and registry rules from name.ai. Read-only.

4 tools answering

DNS

by ofershap

MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config

55 installs/wk local only

Domains

by pipeworx-io

Domains MCP — domain registration lookup + availability search over live

40 tools answering

Network

by rog0x

DNS, IP info, SSL, WHOIS, ping for AI agents

32 installs/wk local only

Namecheap

by codechap

MCP server for Namecheap — check availability, list domains, and get pricing

local only

XRPName

by xrpdomains

XRPL domains for AI agents — availability, pricing, profiles, portfolio, and register links.

83 installs/wk 10 tools answering

WhoisJSON — questions

Answers built from our own checks of this server.

Why is there no uptime for WhoisJSON?

WhoisJSON runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @whoisjson/mcp-server was installed 54 times last week.

How do I connect WhoisJSON?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @whoisjson/mcp-server straight from npm; nothing to host, nothing to sign up for.

How many people use WhoisJSON?

The npm package @whoisjson/mcp-server was installed 54 times in the last week. Week over week that is +107%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is WhoisJSON open source?

We cannot say either way: written in TypeScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.