DNS
MCP server for DNS lookups, reverse DNS, WHOIS, and domain checks — zero auth, zero config
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y mcp-server-dns
MCP client config
{
"mcpServers": {
"dns": {
"command": "npx",
"args": [
"-y",
"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.
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
