@extension.dev/mcp

MCP server that lets AI agents (Claude Code, Claude Desktop, Cursor, Copilot, Codex) build, run, inspect, and publish browser extensions. 33 tools for scaffold…

Developer Tools

Install Command

npx -y @extension.dev/mcp

Claude Desktop Config

{
  "mcpServers": {
    "extension-dev-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@extension.dev/mcp"
      ]
    }
  }
}

@extension.dev/mcp is a community MCP server that connects AI assistants like Claude to mcp server that lets ai agents (claude code, claude desktop, cursor, copilot, codex) build, run, inspect, and publish browser extensions. 33 tools for scaffold…. It runs locally on your machine, keeping your data private and giving you full control over the connection. Developers can use it to bring AI assistance directly into their build and coding environment.

About @extension.dev/mcp

Overview

MCP server that lets AI agents (Claude Code, Claude Desktop, Cursor, Copilot, Codex) build, run, inspect, and publish browser extensions. 33 tools for scaffolding, live DOM inspection, log streaming, and store-ready builds across Chrome, Edge, Firefox, Sa

Topics

mcp, mcp-server, model-context-protocol, ai-agent, agents, claude, claude-code, claude-desktop, cursor, github-copilot, codex, browser-extension, chrome-extension, firefox-addon, edge-extension, safari-web-extension, manifest-v3, webextension, cross-browser, developer-tools, extension.dev, extension.js

Who Should Use @extension.dev/mcp?

1Manage repositories, issues, and pull requests through Claude
2Control a browser and scrape the web through Claude
3Speed up coding workflows by letting Claude interact with your dev environment
4Run terminal commands, manage processes, and inspect logs via AI

How to Install @extension.dev/mcp

Before you start

You will need Node.js (v18 or later) installed on your machine — download it from nodejs.org if you haven't already.

1Open a terminal (Terminal on Mac, Command Prompt or PowerShell on Windows).
2Paste the install command above and press Enter — Node.js will download and run the server automatically.
3Add the server to your Claude Desktop config file (see the JSON snippet above) and restart Claude.

The Claude Desktop config snippet above can be copied and pasted directly into your claude_desktop_config.json file — no editing required.