About Mcp Server Dns
Mcp Server Dns provides AI assistants with DNS, reverse DNS, WHOIS, and domain checks. It uses Node.js’s built-in DNS module and public WHOIS servers, so it needs no API keys or configuration.
Key features
- 01Look up multiple DNS record types
- 02Run reverse DNS lookups
- 03Resolve several record types at once
- 04Check domain nameservers
- 05Query WHOIS data
Use cases
- 01Investigate MX records during email delivery issues
- 02Check nameservers for a new domain
- 03Inspect registration details for a suspicious URL
MCP support
As an MCP server, it exposes DNS, reverse DNS, nameserver, and WHOIS lookup tools to clients.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
Tools
5Saved tool list · updated 3w ago
| Parameter | Type | Required | Description |
|---|---|---|---|
| domain | string | Yes | Domain name to look up (e.g. example.com) |
| type | enum | No | Record type: A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, or PTRA | AAAA | MX | TXT | CNAME | NS | SOA | SRV | PTR |
Details
From the project READMEmcp-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
Comments
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