PassportMCP

What is PassportMCP?

PassportMCP (ppmcp) lets you build MCP servers for any website with automatic browser auth syncing. It wraps FastMCP and automatically adds necessary auth headers and cookies from the browser to outbound requests. It is designed for developers who want to interact with websites they are already logged into, without needing official developer APIs.

How to use PassportMCP?

Install the package with pip install ppmcp, then run ppmcp setup to configure native messaging and the Chrome extension. In your Python code, import PassportMCP, create an instance with a name and domain, and define tools using the @mcp.tool() decorator. For simpler use cases without MCP tools, you can use the BrowserPassport HTTP client directly.

Key features of PassportMCP

• 🔐 Automatic browser auth syncing
• 🛠️ Normal MCP tool creation
• 🌐 Works with any website
• 🔄 Always uses latest auth state
• 🍪 Handles cookies and headers
• 🔒 All credentials stay on your machine

Use cases of PassportMCP

• Build MCP servers for websites like LinkedIn or Twitter without needing official APIs
• Access authenticated data from sites with rate limits or slow approval processes
• Create tools that use the user's logged‑in session automatically
• Avoid storing credentials in the cloud while still using MCP tools

FAQ from PassportMCP

How does PassportMCP handle credentials?

Credentials never leave your machine — there is no cloud storage or transmission. Access is limited to authorized domains and LLMs never see your credentials.

What are the runtime dependencies?

Python 3 and a Chrome browser (requires the Chrome Web Store extension or a local extension build from the repository).

Does PassportMCP work with any website?

Yes. As long as you log in through the browser, PassportMCP can capture the authentication state for any website.

What is the difference between PassportMCP and BrowserPassport?

PassportMCP is for creating MCP tools with tool definitions. BrowserPassport is a lightweight HTTP client for simpler use cases that don’t require MCP tools.

How is PassportMCP different from Anon or Rabbit?

Unlike those cloud‑based account automation services, PassportMCP keeps everything local and secure — credentials never leave your machine.