MCP Bridge connects Chrome sessions to local AI agents
MCP Bridge - Cookie Source, developed by Dmitriy Gukovskiy, is a Chrome extension that connects the browser to Model Context Protocol servers to supply authenticated session context to AI agents. It exports active session cookies so models can perform actions on sites using the user's logged-in state. The extension focuses on session synchronization, MCP-oriented integration, and open-source visibility. Developers, AI researchers, and power users gain a simpler path to give agents authenticated web access for testing and automation tasks.
How the extension supplies authenticated session context to local agents
MCP Bridge exports the browser's session cookies to local MCP servers using a native messaging channel, enabling agents to act with the same authenticated context as the user. The tool requires a companion native host installed on the host machine via the provided setup command, and it is compatible with clients that speak the Model Context Protocol such as Claude Desktop and Cursor.
How it interacts with site protections and real-world pages
The extension uses real browser sessions and live cookies to reduce anti-automation friction, so agents operate inside the genuine login state rather than simulating credentials. That approach can let AI-driven clients access pages protected by systems like Cloudflare or DataDome more reliably than scripted scrapers that lack a logged-in session.
What privacy and transparency guarantees are built in
Data transfers occur locally and the project is open-source. Cookies are passed through the browser's native messaging pipe to a server running on the same machine, and the project is part of the mcp-bridge-dev repository so community members can audit the code and the privacy filters. The extension does not perform remote tracking or analytics according to its architecture notes.
Which browsers and agent ecosystems it fits best
The extension targets Chromium-based browsers and MCP-compatible agents. It is available for Chrome and other Chromium derivatives and is optimized for tools that implement the MCP standard. The developer, Gukovskiy, positions the project for developers, researchers, and advanced users building agent workflows that need authenticated, local session context rather than cloud-based connectors.
A practical developer tool for locally controlled authenticated agent workflows
MCP Bridge is a pragmatic choice for technically proficient developers and researchers who need agents to operate inside real, logged-in sessions. It prioritizes local control and auditability over turnkey convenience, so teams that prefer direct control of session data and open-source code benefit most. Users seeking a plug-and-play cloud connector should expect a trade-off in setup complexity and operational responsibility.
