Have I Been Pwned MCP Server

A Model Context Protocol (MCP) server for the Have I Been Pwned (HIBP) API that allows you to query breach data using natural language.

Overview

This MCP server provides tools to interact with the Have I Been Pwned API, allowing you to:

• Check if an email address has been in a data breach
• Get details about specific breaches
• Check if a password has been exposed in known data breaches
• Check if an email address appears in pastes

GitHub Repo

NPM Package

Blog

Installation & Configuration

Option 1: NPM Installation (Recommended)

1. Install Node.js (v22.10.0 or higher recommended)
2. Get your HIBP API key from https://haveibeenpwned.com/API/Key
3. Configure your MCP client (e.g., Claude Desktop ) with:

{
  "mcpServers": {
    "HIBP-MCP": {
      "command": "npx",
      "args": ["-y", "@darrenjrobinson/hibp-mcp"],
      "env": {
        "HIBP_API_KEY": "<your-hibp-api-key>",
        "HIBP_SUBSCRIPTION_PLAN": "Pwned 1"
      }
    }
  }
}

Option 2: Local Development

1. Clone this repository:

git clone https://github.com/darrenjrobinson/HIBP-MCP-Server.git

1. Install dependencies:

cd HIBP-MCP-Server
npm install

1. Build the project:

npm run build

1. Configure your MCP client with:

{
  "mcpServers": {
    "HIBP-MCP": {
      "command": "node",
      "args": ["path/to/hibp-mcp/build/main.js"],
      "env": {
        "HIBP_API_KEY": "<your-hibp-api-key>",
        "HIBP_SUBSCRIPTION_PLAN": "Pwned 1"
      }
    }
  }
}

Environment Variables

Usage Examples

Once configured, you can ask Claude natural language questions about data breaches. Here are some examples:

Checking Email Breaches

• "Has email address test@example.com appeared in any data breaches?"
• "What breaches contain the email address test@example.com?"
• "Show me all breaches for test@example.com"

Checking Specific Breaches

• "Tell me about the LinkedIn data breach"
• "What data was exposed in the Adobe breach?"
• "List all known data breaches"

Checking Passwords

• "Has the password 'Password123' been exposed in any breaches?"
• "Is my password 'MySecurePass2024' safe to use?"
• "Check if this password has been compromised: 'TestPass1234'"

Checking Pastes

• "Has test@example.com appeared in any pastes?"
• "Show me paste data for test@example.com"

Tools

HIBP-Breaches

Query breached accounts and breaches from the Have I Been Pwned API.

Parameters:

• operation: The HIBP operation to perform (getAllBreachesForAccount, getAllBreachedSites, getBreachByName, getDataClasses)
• account: Email address to check for breaches (required for getAllBreachesForAccount)
• domain: Domain to filter breaches by (optional)
• name: Breach name to get details for (required for getBreachByName)
• includeUnverified: Whether to include unverified breaches (optional)
• truncateResponse: Whether to truncate the response (optional)

HIBP-Pastes

Query pastes containing account data from the Have I Been Pwned API.

Parameters:

• account: Email address to check for pastes (required)

HIBP-PwnedPasswords

Check if a password has been exposed in data breaches using the Pwned Passwords API.

Parameters:

• password: Password to check (will be hashed locally before sending and only the first 5 characters sent)

Security Note

Passwords checked through the HIBP-PwnedPasswords tool are never sent in plain text. They are hashed locally using SHA-1, and only the first 5 characters of the hash are sent to the API using k-anonymity.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT

Author

Darren J Robinson