ofershap/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.
> Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP client. Uses Node.js native dns module, 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:
Claude Desktop
Add to claude_desktop_config.json:
VS Code
Add to user settings or .vscode/mcp.json:
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
See also
More MCP servers and developer tools on my portfolio.
Author
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README built with README Builder
License
MIT © 2026 Ofer Shapira