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MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config
About
MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config
Security Report
Valid MCP server (2 strong, 4 medium validity signals). 1 known CVE in dependencies Package registry verified. Imported from the Official MCP Registry. Trust signals: trusted author (18/19 approved).
8 files analyzed · 2 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-ofershap-dns": {
"args": [
"-y",
"mcp-server-dns"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
mcp-server-dns
DNS lookups, reverse DNS, WHOIS, and domain checks from your AI assistant. No API keys, no config. Powered by Node.js built-in DNS.
npx mcp-server-dns
Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP client. Uses Node.js native
dnsmodule, so there's nothing to sign up for.
Demo built with remotion-readme-kit
Why
DNS and WHOIS lookups come up more often than you'd think during development. Debugging email delivery? You need MX records. Setting up a new domain? Check the nameservers. Investigating a suspicious URL? WHOIS tells you who owns it. The existing MCP options for this require paid API keys (like WhoisXML API). This server uses Node.js built-in DNS resolution and public WHOIS servers, so it works out of the box with zero accounts or credentials.
Tools
| Tool | What it does |
|---|---|
dns_lookup | Look up A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, or PTR |
reverse_dns | Perform reverse DNS (PTR) lookup on an IP address |
resolve_all | Resolve A, AAAA, MX, TXT, NS, CNAME in one call |
check_nameservers | Get nameserver (NS) records for a domain |
whois | Query WHOIS data (follows IANA referrals to registrar) |
Quick Start
Cursor
Add to .cursor/mcp.json:
{
"mcpServers": {
"dns": {
"command": "npx",
"args": ["-y", "mcp-server-dns"]
}
}
}
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"dns": {
"command": "npx",
"args": ["-y", "mcp-server-dns"]
}
}
}
VS Code
Add to user settings or .vscode/mcp.json:
{
"mcp": {
"servers": {
"dns": {
"command": "npx",
"args": ["-y", "mcp-server-dns"]
}
}
}
}
Examples
- "What are the DNS records for example.com?"
- "Do a reverse DNS lookup on 8.8.8.8"
- "Show me the WHOIS info for github.com"
- "What nameservers does cloudflare.com use?"
- "Resolve all record types for google.com"
- "Check the MX records for my-company.com"
Development
git clone https://github.com/ofershap/mcp-server-dns.git
cd mcp-server-dns
npm install
npm test
npm run build
See also
More MCP servers and developer tools on my portfolio.
Author
README built with README Builder
License
MIT © 2026 Ofer Shapira
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