sslmon-mcp

SSL Monitor MCP Server

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An MCP server that provides domain registration information and SSL certificate monitoring capabilities.

Quick Start

Add this MCP server to Claude Desktop:

# Using NPX (recommended)
claude mcp add sslmon -- npx -y sslmon-mcp

Features

1. Domain Registration Info - Get domain registration and expiration dates via WHOIS lookup
2. SSL Certificate Monitoring - Check SSL certificate validity periods and details

Tools

get_domain_info

Get domain registration and expiration information using WHOIS lookup.

Parameters:

• domain (string, required): The top-level domain to check (e.g., "example.com")

Returns: JSON object with:

• domain: The queried domain
• registrationDate: Domain registration date
• expirationDate: Domain expiration date
• registrar: Domain registrar name
• registrant: Domain registrant information (when available)
• status: Domain status

get_ssl_cert_info

SSL Certificate information query

Parameters:

• domain (string, required): The domain to check SSL certificate for
• port (number, optional): Port number to check (default: 443)

Returns: JSON object with:

• domain: The queried domain
• validFrom: Certificate valid from date (ISO string)
• validTo: Certificate valid to date (ISO string)
• issuer: Certificate issuer
• subject: Certificate subject
• isValid: Boolean indicating if certificate is currently valid
• daysUntilExpiry: Number of days until certificate expires

Installation

npm install
npm run build

Usage

npm start

Development

npm run dev

Example Usage

Once configured in your MCP client:

// Check domain registration info
await mcp.callTool("get_domain_info", { domain: "google.com" });

// Check SSL certificate
await mcp.callTool("get_ssl_cert_info", { domain: "google.com" });