Whois MCP
Free对域名、IP、ASN 和 TLD 执行 whois 查询。
FreeFree tier
About Whois MCP
Whois MCP is a Model Context Protocol (MCP) server that enables AI agents such as Claude Desktop, Cursor, Windsurf, and Roo Code to perform WHOIS lookups directly. It provides four tools: whois_domain (for domain names), whois_tld (for top-level domains), whois_ip (for IP addresses), and whois_as (for Autonomous System Numbers). Users can ask AI agents to check domain availability, find registrant details, registration and expiry dates, name servers, and domain status without leaving their development environment. The server is free, open source (MIT license), and can be run instantly via npx.
Key Features
Provides four WHOIS lookup tools: whois_domain, whois_tld, whois_ip, whois_as
Works with AI agents: Claude Desktop, Cursor, Windsurf, Roo Code
Instant run via npx - no installation required
Open source (MIT license) and free to use
Pros & Cons
Pros
- Free and open source with permissive MIT license
- Easy setup: single npx command, no configuration files needed
- Integrates seamlessly into popular AI coding assistants
- Supports multiple query types: domain, TLD, IP, ASN
- No browser needed – AI handles the lookup automatically
Cons
- Requires Node.js and npm/pnpm to run
- WHOIS data quality depends on the upstream registry; privacy-protected domains may show limited info
- Only works within MCP-compatible AI agents, not as a standalone tool
Best For
Check if a domain name is available for registrationFind the owner or registrar of a domainRetrieve domain registration and expiry datesGet DNS name servers and domain statusLook up IP address and Autonomous System Number information
FAQ
What is a WHOIS lookup?
A WHOIS lookup queries a WHOIS database to retrieve registration details about a domain name, IP address, or autonomous system, such as who owns it, when it was registered, and when it expires.
What information can a WHOIS lookup provide?
It can provide the domain name, registrar name, registrant details (if not privacy-protected), registration and expiry dates, name servers, domain status, and administrative/technical contacts.
How do I use Whois MCP with Cursor IDE?
In Cursor Settings > MCP, click +Add New MCP Server, set Type to 'command', and enter: npx -y @bharathvaj/whois-mcp@latest
Is this tool free?
Yes, Whois MCP is free and open source under the MIT license.
Which AI agents are supported?
Claude Desktop, Cursor, Windsurf, and Roo Code are explicitly mentioned; other MCP-compatible agents should also work.