How do I install the browser extension?

Download the appropriate M2 or M3 build for your browser from the releases, then load it as an unpacked extension or install the .xpi for Firefox.

Can I run the MCP server over HTTP?

Yes, you can run it with --transport http, but it defaults to localhost for security since there is no authentication.

Is authentication supported?

No, the server currently lacks authentication, so network access should be restricted to trusted hosts.

How do I add this MCP server to my client?

Configure your MCP client to run 'npx @mcp-browser-kit/server@latest' or point it to the local HTTP URL if running with HTTP transport.

MCP Browser Kit

browserautomationextensionlocalmcp

MCP server enabling AI assistants to control and interact with local browsers via extensions.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "ndthanhdev-mcp-browser-kit": {
      "command": "npx",
      "args": [
        "-y",
        "@mcp-browser-kit/server@latest"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Overview

This MCP server allows AI agents to automate and interact with local web browsers through a companion browser extension. It supports multiple browsers including Chromium-based, Firefox, Brave, Edge, and Safari, with different extension builds for compatibility. Use this server when you want AI-driven browser automation or interaction on your local machine. It requires installing and enabling a browser extension and running the server locally or via HTTP.

Use cases

Automate browser actions through AI commands

Control tabs and bookmarks via AI

Integrate browser interaction into AI workflows

Test browser automation scenarios locally

Enable AI assistants to browse and manipulate web content

Key features

Supports Chromium-based, Firefox, Brave, Edge, and Safari browsers

Two extension builds (M2 with more features, M3 with broader compatibility)

Local stdio or HTTP transport for MCP communication

No built-in authentication; restrict network exposure

Extension installation instructions for major browsers

Capabilities & Tool Schemas

Inspect callable tools, capabilities, and parameters exposed to AI agents by MCP Browser Kit.

Extracted Tool Capabilities

Supports Chromium-based, Firefox, Brave, Edge, and Safari browsers

Two extension builds (M2 with more features, M3 with broader compatibility)

Local stdio or HTTP transport for MCP communication

No built-in authentication; restrict network exposure

Extension installation instructions for major browsers

Documentation Overview

MCP Browser Kit

🚀 On the main branch? You're viewing the bleeding-edge dev docs! For other versions, check out the release/* branches.

An MCP Server that enables AI assistants to interact with your local browsers.

https://github.com/user-attachments/assets/1fbf87fd-06d1-42bf-a06f-cc2bbdf375a8

Usage

Add MCP Browser Kit to your MCP Client:
config.json
```
{
	"mcpServers": {
		"browser-kit": {
			"command": "npx",
			"args": ["@mcp-browser-kit/server@latest"]
		}
	}
}
```
By default the server use stdio transport, alternatively you can use http transport:
Terminal
```
npx @mcp-browser-kit/server@latest --transport http
# optional flags (defaults shown):
#   --http-host 127.0.0.1
#   --http-port 21082
```
Then point your MCP client at the URL instead of a command:
config.json
```
{
	"mcpServers": {
		"browser-kit": {
			"url": "http://127.0.0.1:21082/mcp"
		}
	}
}
```
Security: there's no auth yet, so --http-host defaults to 127.0.0.1 (loopback only). Only pass --http-host 0.0.0.0 (or a LAN address) if you understand that anyone who can reach that host/port can control your browser.
Choose the right extension build for your browser:
- Check the Compatibility table below to see which build (M2 or M3) is compatible with your browser
- Note that M2 builds offer more functionality than M3 builds, so prefer M2 if your browser supports both
Download the latest compatible build from The Latest Release.
Load the extension into a compatible browser and enable it.
Refresh open tabs to ensure extension scripts are loaded.

Start messaging on your MCP Client:

Code

Use browser-kit, star the last open GitHub repo on my browser

Optional, check User Notes for more information.

Compatibility table

The M2 build supports more functionalities than the M3 build. Extension file name patterns:

M2 build:

Chromium: mcp_browser_kit_m2-<version>.zip (e.g., mcp_browser_kit_m2-5.0.0.zip)

Firefox: mcp_browser_kit_m2-<version>.xpi (e.g., mcp_browser_kit_m2-5.0.0.xpi)

M3 build: mcp_browser_kit_m3-<version>.zip (e.g., mcp_browser_kit_m3-5.0.0.zip)

Browser	M2 build	M3 build
Chrome	❌	✅
Brave	✅	✅
Edge	✅	✅
Firefox	✅	❌
Safari	✅	❌

Load Extension

Chromium-based browsers (Chrome, Brave, Edge)
1. Unzip the downloaded .zip file
2. Open chrome://extensions/
3. Enable Developer mode
4. Click Load unpacked
5. Select the unpacked extension folder
Firefox
1. Open about:addons
2. Click the gear icon and select Install Add-on From File
3. Select the downloaded .xpi file
Safari
1. Unzip the downloaded .zip file
2. Open Develop > Show Extension Builder
3. Click + and select Add Extension
4. Select the unpacked extension folder
5. Click Install to install the extension

User Notes

Note for Alpha stage: Consider using a separate browser profile or dedicated browser instance with this MCP to prevent sensitive data from being unintentionally exposed to AI model providers.

Security: BrowserKit currently lacks authentication for incoming requests. Keep ports 21082 and 2769-2799 on your device network only.

Hosted deployment

A hosted deployment is available on Fronteir AI.

Read the full README →View source on GitHub →

Related MCP Servers

View all in Browser Automation View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars

Stargazers on the source repository.

Last commit

26d ago

Most recent push to the default branch.

Directory activity

2 views

Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about MCP Browser Kit

Supports Chrome (M3 only), Brave, Edge, Firefox (M2 only), and Safari (M2 only) with different extension builds.

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Technical Specs & Signals

CategoryBrowser Automation

PricingFree

45Quality signal: Fair · 45/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools17/30

Adoption & activity7/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 22d ago via OSV.dev · @mcp-browser-kit/server@latest (npm)

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More in 📂 Browser Automation →Best MCP servers for Browser Automation →Alternatives to MCP Browser Kit →Install in Claude Desktop Install in Cursor Install in VS Code

Overview

Use cases

Automate browser actions through AI commands

Control tabs and bookmarks via AI

Integrate browser interaction into AI workflows

Test browser automation scenarios locally

Enable AI assistants to browse and manipulate web content

Key features

Supports Chromium-based, Firefox, Brave, Edge, and Safari browsers

Two extension builds (M2 with more features, M3 with broader compatibility)

Local stdio or HTTP transport for MCP communication

No built-in authentication; restrict network exposure

Extension installation instructions for major browsers

Documentation Overview

MCP Browser Kit

🚀 On the main branch? You're viewing the bleeding-edge dev docs! For other versions, check out the release/* branches.

An MCP Server that enables AI assistants to interact with your local browsers.

https://github.com/user-attachments/assets/1fbf87fd-06d1-42bf-a06f-cc2bbdf375a8

Usage

Add MCP Browser Kit to your MCP Client:
config.json
```
{
	"mcpServers": {
		"browser-kit": {
			"command": "npx",
			"args": ["@mcp-browser-kit/server@latest"]
		}
	}
}
```
By default the server use stdio transport, alternatively you can use http transport:
Terminal
```
npx @mcp-browser-kit/server@latest --transport http
# optional flags (defaults shown):
#   --http-host 127.0.0.1
#   --http-port 21082
```
Then point your MCP client at the URL instead of a command:
config.json
```
{
	"mcpServers": {
		"browser-kit": {
			"url": "http://127.0.0.1:21082/mcp"
		}
	}
}
```
Security: there's no auth yet, so --http-host defaults to 127.0.0.1 (loopback only). Only pass --http-host 0.0.0.0 (or a LAN address) if you understand that anyone who can reach that host/port can control your browser.
Choose the right extension build for your browser:
- Check the Compatibility table below to see which build (M2 or M3) is compatible with your browser
- Note that M2 builds offer more functionality than M3 builds, so prefer M2 if your browser supports both
Download the latest compatible build from The Latest Release.
Load the extension into a compatible browser and enable it.
Refresh open tabs to ensure extension scripts are loaded.

Start messaging on your MCP Client:

Code

Use browser-kit, star the last open GitHub repo on my browser

Optional, check User Notes for more information.

Compatibility table

The M2 build supports more functionalities than the M3 build. Extension file name patterns:

M2 build:

Chromium: mcp_browser_kit_m2-<version>.zip (e.g., mcp_browser_kit_m2-5.0.0.zip)

Firefox: mcp_browser_kit_m2-<version>.xpi (e.g., mcp_browser_kit_m2-5.0.0.xpi)

M3 build: mcp_browser_kit_m3-<version>.zip (e.g., mcp_browser_kit_m3-5.0.0.zip)

Browser	M2 build	M3 build
Chrome	❌	✅
Brave	✅	✅
Edge	✅	✅
Firefox	✅	❌
Safari	✅	❌

Load Extension

Chromium-based browsers (Chrome, Brave, Edge)
1. Unzip the downloaded .zip file
2. Open chrome://extensions/
3. Enable Developer mode
4. Click Load unpacked
5. Select the unpacked extension folder
Firefox
1. Open about:addons
2. Click the gear icon and select Install Add-on From File
3. Select the downloaded .xpi file
Safari
1. Unzip the downloaded .zip file
2. Open Develop > Show Extension Builder
3. Click + and select Add Extension
4. Select the unpacked extension folder
5. Click Install to install the extension

User Notes

Note for Alpha stage: Consider using a separate browser profile or dedicated browser instance with this MCP to prevent sensitive data from being unintentionally exposed to AI model providers.

Security: BrowserKit currently lacks authentication for incoming requests. Keep ports 21082 and 2769-2799 on your device network only.

Hosted deployment

A hosted deployment is available on Fronteir AI.