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Chrome Extension MCP Server (Go Version)

Chrome Extension MCP Server (Go Version)

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github.com/fujironDeveloper Tools3Updated 77w ago
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About Chrome Extension MCP Server (Go Version)

A Go MCP server that bridges Claude and Chrome extensions over WebSocket. Its tools expose browser and extension operations such as tab management, DOM changes, cookie access, and screenshots.

Key features

  1. 01Connect to extensions over WebSocket
  2. 02Manage browser tabs
  3. 03Run DOM operations
  4. 04Inject CSS
  5. 05Inspect extension information
  6. 06Access cookies and capture screenshots

Use cases

  1. 01Read information about open tabs
  2. 02Modify a page's DOM or styling
  3. 03Send messages to an extension background script
  4. 04Capture a screenshot of the active tab

MCP support

Exposes Chrome browser and extension operations as tools for MCP clients, communicating with the Chrome extension over WebSocket.

#chrome-extension#mcp#go

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "chrome-extension-mcp-go": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "build"
      ]
    }
  }
}
Run commanddocker run -i --rm build

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
ocibuild

Tools

No tool list yet

Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.

Details

From the project README

Chrome Extension MCP Server (Go Version)

A Go implementation of the Model Context Protocol (MCP) server for Chrome Extension API, enabling Claude to interact with Chrome browser extensions.

Overview

This project is a Go implementation of the original TypeScript version of the Chrome Extension MCP Server. It provides a WebSocket server that bridges the Claude AI with Chrome extensions, allowing Claude to perform various browser operations through the Chrome API.

Features

  • WebSocket server for Chrome extension communication
  • Support for Model Context Protocol (MCP)
  • Various Chrome browser operations through tools:
    • Tab management
    • DOM manipulation
    • CSS injection
    • Extension management
    • Cookie access
    • Screenshot capture
    • And more

Installation

1. Install Chrome Extension
Using Docker
  1. Build and run the Docker container:
docker build -t mcp/chromeextension-go .
docker run -i --rm mcp/chromeextension-go
  1. Extract the extension package (if not already available):
docker cp $(docker ps -q -f ancestor=mcp/chromeextension-go):/app/extension extension
  1. Install in Chrome:
    • Open Chrome and go to chrome://extensions/
    • Enable "Developer mode" in the top right
    • Click "Load unpacked" and select the extracted extension directory
Manual Installation
  1. Navigate to the extension directory:
cd extension
  1. Load in Chrome:
    • Open Chrome and go to chrome://extensions/
    • Enable "Developer mode" in the top right
    • Click "Load unpacked" and select the extension directory
2. Running the Server
From Source
go run main.go
Using Binary
go build
./chrome-extension-mcp-go
3. Configure MCP Server for Claude

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "chromeextension": {
      "command": "path/to/chrome-extension-mcp-go",
      "args": [],
      "env": {
        "CHROME_EXTENSION_ID": "your-extension-id"
      }
    }
  }
}

Tools

This MCP server provides the following tools to Claude:

  1. chrome_get_active_tab: Get information about the currently active tab
  2. chrome_get_all_tabs: Get information about all open tabs
  3. chrome_execute_script: Execute DOM operations in the context of a web page
  4. chrome_inject_css: Inject CSS into a web page
  5. chrome_get_extension_info: Get information about installed extensions
  6. chrome_send_message: Send a message to an extension's background script
  7. chrome_get_cookies: Get cookies for a specific domain
  8. chrome_capture_screenshot: Take a screenshot of the current tab
  9. chrome_create_tab: Create a new tab with specified URL and options

License

This project is licensed under the MIT License.

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