Add it to Claude Code
claude mcp add mcp-server-dns -- npx -y mcp-server-dnsMake your agent remember this setup
mcp-server-dns's config, env vars, and the gotchas you hit — recalled in every future Claude Code, Cursor, and Codex session.
npx conare@latestFree · one command · indexes the sessions already on disk. Set up in the browser instead →
What it does
- Performs DNS lookups including A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, and PTR
- Supports reverse DNS (PTR) lookups for IP addresses
- Queries WHOIS data with support for IANA referrals
- Zero configuration and no API keys required
- Uses Node.js native DNS module for resolution
Tools 5
dns_lookupLook up A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, or PTR records.reverse_dnsPerform reverse DNS (PTR) lookup on an IP address.resolve_allResolve A, AAAA, MX, TXT, NS, CNAME in one call.check_nameserversGet nameserver (NS) records for a domain.whoisQuery WHOIS data (follows IANA referrals to registrar).Try it
Original README from ofershap/mcp-server-dns
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.
<sub>Demo built with remotion-readme-kit</sub>
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
<sub>README built with README Builder</sub>
License
MIT © 2026 Ofer Shapira