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mcp/harbor
Claude Code

WhoisJSON for Claude Code

io.github.whoisjson/mcp-server

WHOIS, DNS, SSL, and domain availability lookups for AI assistants

client:Claude Code transport:stdio runtime:npm

Install WhoisJSON in Claude Code

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add mcp-server -e WHOISJSON_API_KEY=<WHOISJSON_API_KEY> -- npx -y @whoisjson/mcp-server

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

WhoisJSON in other clients

WhoisJSON MCP server