WhoisJSON
Let your coding agent run WHOIS, DNS, SSL, and domain availability checks without leaving the chat while you pick a product name and hosting setup.
Overview
WhoisJSON is an MCP server for the validate phase that runs WHOIS, DNS, SSL, and domain availability lookups through your agent.
What is this MCP server?
- WHOIS registration lookups via WhoisJSON API
- DNS record inspection for nameserver and mail setup
- SSL certificate status checks before launch
- Domain availability queries for naming alternatives
- stdio npm package @whoisjson/mcp-server with WHOISJSON_API_KEY
- Server version 1.0.3 on npm package @whoisjson/mcp-server
- stdio transport with required secret WHOISJSON_API_KEY
- Covers WHOIS, DNS, SSL, and availability lookup classes per server description
What problem does it solve?
Naming and infrastructure checks scatter across registrar sites, dig, and openssl while you are trying to ship a landing page.
Who is it for?
Indie builders validating product names, email DNS, and TLS on a first domain with an API key already in hand.
Skip if: Teams that need bulk domain portfolios, offline-only workflows, or deep penetration testing without a WhoisJSON account.
What do I get? / Deliverables
Your agent returns unified domain, DNS, SSL, and availability answers in one thread so you can commit to a URL faster.
- WHOIS and registrar metadata for a domain
- DNS configuration snapshot
- SSL/TLS status for a hostname
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Journey fit
Domain and certificate vetting sits on the validate shelf because solo builders name products and secure URLs before they commit to a full build. Landing-phase work includes reserving domains, verifying DNS, and confirming SSL readiness for the first public URL.
How it compares
MCP integration to a domain API, not a browser automation skill or local dig wrapper.
Common Questions / FAQ
Who is WhoisJSON MCP for?
Solo and small-team builders using AI coding agents who want registrar, DNS, and SSL facts during naming and launch prep.
When should I use WhoisJSON MCP?
Use it while scoping a landing URL, auditing competitor domains, or confirming DNS and certificates before you point traffic.
How do I add WhoisJSON MCP to my agent?
Install @whoisjson/mcp-server, set WHOISJSON_API_KEY in the environment, and register the stdio MCP server in Claude Code, Cursor, or Codex.