whois-mcp-server

A community MCP server that provides tools for domain and network intelligence. It allows agents to look up domain registration details, check registry record status, fetch DNS records via DNS-over-HTTPS, and resolve IPs and ASNs using RDAP. It supports STDIO and Streamable HTTP transports and requires no API key.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Look up full domain registration records including registrar and dates
Check if a domain is registered or available via registry status
Fetch DNS owner records like A, AAAA, MX, and TXT via DoH
Resolve IPs and ASNs to their org names and RIR sources

Source and maintenance

Community listingRegistry 0.2.1

mcp-registry: io.github.cyanheads/whois-mcp-server@0.2.1 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/whois-mcp-server 0.2.1

npmnpx

@cyanheads/whois-mcp-server package definition

{
  "version": "0.2.1",
  "transport": "stdio",
  "identifier": "@cyanheads/whois-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    },
    {
      "name": "RDAP_TIMEOUT_MS",
      "format": "string",
      "default": "5000",
      "description": "HTTP timeout for RDAP requests in milliseconds."
    },
    {
      "name": "DOH_TIMEOUT_MS",
      "format": "string",
      "default": "3000",
      "description": "HTTP timeout for DNS-over-HTTPS requests in milliseconds."
    },
    {
      "name": "RDAP_MAX_RETRIES",
      "format": "string",
      "default": "2",
      "description": "Max retry attempts on transient RDAP failures."
    },
    {
      "name": "DOH_MAX_RETRIES",
      "format": "string",
      "default": "2",
      "description": "Max retry attempts on transient DNS-over-HTTPS failures."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "whois-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/whois-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "RDAP_TIMEOUT_MS": "<YOUR_RDAP_TIMEOUT_MS>",
        "DOH_TIMEOUT_MS": "<YOUR_DOH_TIMEOUT_MS>",
        "RDAP_MAX_RETRIES": "<YOUR_RDAP_MAX_RETRIES>",
        "DOH_MAX_RETRIES": "<YOUR_DOH_MAX_RETRIES>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "whois-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/whois-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "RDAP_TIMEOUT_MS": "<YOUR_RDAP_TIMEOUT_MS>",
        "DOH_TIMEOUT_MS": "<YOUR_DOH_TIMEOUT_MS>",
        "RDAP_MAX_RETRIES": "<YOUR_RDAP_MAX_RETRIES>",
        "DOH_MAX_RETRIES": "<YOUR_DOH_MAX_RETRIES>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "whois-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/whois-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "RDAP_TIMEOUT_MS": "<YOUR_RDAP_TIMEOUT_MS>",
        "DOH_TIMEOUT_MS": "<YOUR_DOH_TIMEOUT_MS>",
        "RDAP_MAX_RETRIES": "<YOUR_RDAP_MAX_RETRIES>",
        "DOH_MAX_RETRIES": "<YOUR_DOH_MAX_RETRIES>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "whois-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/whois-mcp-server@0.2.1"
      ],
      "env": {
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "RDAP_TIMEOUT_MS": "<YOUR_RDAP_TIMEOUT_MS>",
        "DOH_TIMEOUT_MS": "<YOUR_DOH_TIMEOUT_MS>",
        "RDAP_MAX_RETRIES": "<YOUR_RDAP_MAX_RETRIES>",
        "DOH_MAX_RETRIES": "<YOUR_DOH_MAX_RETRIES>"
      }
    }
  }
}

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