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browser-mcp

★ 25 Open GitHub ↗

Drive your real, logged-in Chrome from any AI agent (Claude Code, Cursor, VS Code) — works where headless dies. Reads emailed login codes from your Gmail, solves CAPTCHAs, 34 tools. MIT, local-only.

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# Browser MCP by [Agent360](https://agent360.dk)

[![npm version](https://img.shields.io/npm/v/@agent360/browser-mcp)](https://www.npmjs.com/package/@agent360/browser-mcp)
[![npm downloads](https://img.shields.io/npm/dw/@agent360/browser-mcp)](https://www.npmjs.com/package/@agent360/browser-mcp)
[![GitHub stars](https://img.shields.io/github/stars/Agent360dk/browser-mcp)](https://github.com/Agent360dk/browser-mcp)
[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![MCP](https://img.shields.io/badge/MCP-compatible-blue)](https://modelcontextprotocol.io)
[![Chrome Web Store](https://img.shields.io/badge/Chrome_Web_Store-live-green)](https://chromewebstore.google.com/detail/agent360-browser-mcp/jdehgalffmffhfhmmhaokfbfnafnmgcl)

**Your AI agent drives your real, logged-in Chrome — and works where headless tools die.**

[![Browser MCP Demo](https://raw.githubusercontent.com/Agent360dk/browser-mcp/main/assets/demo.gif)](https://browsermcp.dev)

▶ **[Watch the 37-second demo with sound →](https://browsermcp.dev)**

Browser MCP gives Claude Code (and any MCP client — Cursor, VS Code agent mode) control of your actual Chrome: your cookies, your sessions, your 2FA. So it works on CAPTCHA, 2FA and anti-bot sites where Playwright and Puppeteer get blocked — because it's *you* browsing.

The killer move: it hits a login wall, reads the verification code from your own Gmail tab, and continues the sign-in. No API can do that. Operate platforms with no API, QA your own web app end-to-end, or work dashboards, LinkedIn and Reddit at human pace — with you approving the sensitive steps.

41 tools. Auto-clicks the reCAPTCHA v2 checkbox, with a human fallback for the rest. Multi-session color-coded tab groups. **MIT, free, and 100% local — nothing leaves your machine.**

## Install — 2 steps (~60 seconds)

### Step 1: Configure the MCP server

```bash
npx @agent360/browser-mcp install
```

This copies the Chrome extension files to `~/.browser-mcp/extension/` and adds the MCP server to your Claude Code config. **You'll see the path to the extension folder printed in the terminal — copy it.**

### Step 2: Load the extension in Chrome

> Chrome won't let extensions install themselves from npm — you load it manually one time. To **update** later, re-run the install command and reload it (see [Keeping it updated](#keeping-it-updated)). Prefer the [Chrome Web Store](#chrome-web-store-one-click-install) install if you'd rather have the extension auto-update.

1. **Open Chrome** and type `chrome://extensions` in the address bar
2. **Toggle "Developer mode"** ON (top right corner)
3. **Click "Load unpacked"** (top left, next to "Pack extension")
4. **Navigate to `~/.browser-mcp/extension/`** and click "Select"
   - On Mac: Press `Cmd+Shift+G` in the file picker, paste `~/.browser-mcp/extension/`, press Enter
   - On Windows: Paste `%USERPROFILE%\.browser-mcp\extension\` in the address bar
   - On Linux: Type `~/.browser-mcp/extension/` in the path field
5. **Restart Claude Code** so it picks up the new MCP server

That's it. The Browser MCP icon will appear in your toolbar, and 34 browser tools are now available in Claude Code.

### Alternative: Manual zip download (no npm)

If you don't want to use npm, download the extension directly:

1. [Download `browser-mcp-v1.25.0.zip`](https://github.com/Agent360dk/browser-mcp/releases/latest) from the latest GitHub release
2. Unzip the file (anywhere — e.g. `~/Downloads/browser-mcp-extension/`)
3. Follow Step 2 above, but select the unzipped folder instead of `~/.browser-mcp/extension/`
4. Configure Claude Code manually by adding this to your `~/.claude.json` (or run `npx @agent360/browser-mcp install --skip-extension`):
   ```json
   {
     "mcpServers": {
       "browser-mcp": {
         "command": "npx",
         "args": ["@agent360/browser-mcp"]
       }
     }
   }
   ```

### Chrome Web Store (one-click install)

[**Install from Chrome Web Store →**](https://chromewebstore.google.com/detail/agent360-browser-mcp/jdehgalffmffhfhmmhaokfbfnafnmgcl)

No Developer mode needed. Then run `npx @agent360/browser-mcp install --skip-extension` to configure Claude Code.

## Why This Over Playwright MCP / BrowserMCP?

| | Browser MCP | Playwright MCP | BrowserMCP.io |
|---|---|---|---|
| **Browser** | Your real Chrome | Headless (new session) | Your real Chrome |
| **Maintained** | Actively — v1.25.0 this week | Actively (Microsoft) | Last commit Apr 2025 |
| **Logins/cookies** | Already authenticated | Must log in every time | Already authenticated |
| **Multi-session** | 10 concurrent sessions with color-coded tab groups | Single session | Single session |
| **Human-in-the-loop** | `browser_ask_user` — 2FA, CAPTCHA, credential input | None | None |
| **Provider integrations** | 9 built-in (Stripe, HubSpot, Slack...) | None | None |
| **CORS bypass** | `browser_fetch` from extension background | N/A | Limited |
| **Network monitoring** | `browser_wait_for_network` via CDP | Built-in | None |
| **CSP-strict sites** | Chrome Debugger API throughout | Works (headless) | Limited |
| **Custom dropdowns** | Angular Material, React Select support | Works (headless) | Limited |
| **Install** | `npx @agent360/browser-mcp install` | `npx @playwright/mcp` | Manual clone |

> **On the name:** the similarly-named `browsermcp.io` (`@browsermcp/mcp`) is a different, unaffiliated project with no commits since April 2025. This is Browser MCP by Agent360 (`@agent360/browser-mcp`) — actively maintained. [Full side-by-side →](https://browsermcp.dev/compare/browsermcp-io/)

## 34 Tools

### Navigation & Content
| Tool | Description |
|------|-------------|
| `browser_navigate` | Navigate to URL (reuses tab, or `new_tab=true`) |
| `browser_get_page_content` | Get page text or HTML |
| `browser_screenshot` | Screenshot via Chrome Debugger (works even when tab isn't focused) |
| `browser_execute_script` | Run JavaScript in page context |

### Interaction
| Tool | Description |
|------|-------------|
| `browser_click` | Click via CSS or text selector (`text=Submit`, `button:text(Next)`) |
| `browser_fill` | Fill input fields (works on CSP-strict sites) |
| `browser_press_key` | Keyboard events (Enter, Tab, Escape, modifiers) |
| `browser_scroll` | Scroll to element or by pixels |
| `browser_wait` | Wait for element to appear |
| `browser_hover` | Hover for tooltips/dropdowns |
| `browser_select_option` | Native `<select>` + custom dropdowns (Angular Material, React Select) |
| `browser_set_combobox` | Autocomplete/combobox: type query → wait for filtered listbox → click option (multi-value chip support). Use when `browser_select_option` fails on lazy-rendered options |
| `browser_set_date` | Robust date inputs: tries native value-set → masked typing → calendar-picker navigation (MUI/AntD/react-datepicker/Lexical). Use when `browser_fill` fails on date fields |
| `browser_dismiss_overlays` | Bulk-dismiss popups/modals/tooltips/banners via aria-label/text/×-char heuristics. `non_critical` mode preserves dialogs with form data |
| `browser_handle_dialog` | Accept/dismiss native alert/confirm/prompt dialogs |

### Tabs & Frames
| Tool | Description |
|------|-------------|
| `browser_list_tabs` | List session's tabs only |
| `browser_switch_tab` | Switch to tab by ID |
| `browser_close_tab` | Close tab (session-owned only) |
| `browser_get_new_tab` | Get most recently opened tab (OAuth popups) |
| `browser_list_frames` | List iframes on page |
| `browser_select_frame` | Execute JS in specific iframe |

### Data & Network
| Tool | Description |
|------|-------------|
| `browser_get_cookies` | Get cookies for domain |
| `browser_get_local_storage` | Read localStorage |
| `browser_fetch` | HTTP request from extension (bypasses CORS) |
| `browser_wait_for_network` | Wait for specific API call to complete |
| `browser_extract_token` | Navigate to provider dashboard + extract API token |

### CAPTCHA Solving
| Tool | Description |
|------|-------------|
| `browser_solve_captcha` | Detect and solve CAPTCHAs. Auto-detects reCAPTCHA v2/v3, hCaptcha, Turnstile, FunCaptcha. Actions: `detect`, `click_checkbox` (auto-click, often passes when signed into Google), `click_grid` (AI vision guided), `ask_human` (fallback) |

### Human-in-the-Loop
| Tool | Description |
|------|-------------|
| `browser_ask_user` | Show overlay dialog for 2FA, CAPTCHA, credentials, or any user input |

### Data
| Tool | Description |
|------|-------------|
| `browser_get_cookies` | Get cookies for a domain |
| `browser_set_cookies` | Set cookies for a domain |
| `browser_get_local_storage` | Read localStorage from page |
| `browser_set_local_storage` | Write localStorage values |
| `browser_console_logs` | Capture console.log/warn/error messages from page |
| `browser_upload_file` | Upload files to `<input type="file">` via Chrome Debugger API (no dialog) |
| `browser_drop_file` | Upload via drop-zones: finds hidden `<input type="file">` in target subtree/parent (up to 2 levels). Use when `browser_upload_file` fails because the zone has no visible input |

## Multi-Session Support

Each Claude Code conversation gets its own MCP server on a unique port (9876-9885). The Chrome extension connects to all active servers simultaneously.

```
Claude Session 1 ←(stdio)→ MCP :9876 ←(WS)→
Claude Session 2 ←(stdio)→ MCP :9877 ←(WS)→  Chrome Extension → Browser
Claude Session 3 ←(stdio)→ MCP :9878 ←(WS)→
```

- **Session isolation** — each session gets a color-coded Chrome Tab Group
- **Tab ownership** — sessions can only see and control their own tabs
- **Auto-cleanup** — processes exit when Claude Code closes the conversation

## Built-in Provider Integrations

`browser_extract_token` navigates to the provider's API settings page and guides token extraction:

| Provider | Token Format | Dashboard |
|----------|-------------|-----------|
| Stripe | `sk_test_...` / `sk_live_...` | stripe.com/apikeys |
| HubSpot | `pat-...` | app.hubspot.com |
| Slack | `xoxb-...` | api.slack.com/apps |
| Shopify | Admin API token | admin.shopify.com |
| Pipedrive | UUID | app.pipedrive.com |
| Calendly | JWT | calendly.com |
| Mailchimp | `...-us1` | admin.mailchimp.com |
| Google | OAuth Client | console.cloud.google.com |
| LinkedIn | Client ID/Secret | linkedin.com/developers |

## Architecture

```
extension/
  manifest.json       # Manifest V3
  background.js       # Service worker — Chrome API dispatcher, session tab groups
  offscreen.js        # Persistent WebSocket bridge (multi-port scanning)
  popup.html/js       # Status UI — sessions, tabs, action log

mcp-server/
  index.js            # MCP server (stdio) + WebSocket client
  tools.js            # 34 tool definitions
  bin/cli.js          # Install CLI
```

### How It Works
1. Claude Code starts → spawns MCP server via stdio
2. MCP server binds to first available port (9876-9885)
3. Extension's offscreen document scans ports every 2s
4. WebSocket connection established
5. Commands flow: Claude Code → MCP → Extension → Chrome APIs
6. Process auto-exits when Claude Code closes (stdin detection)

## Keeping it updated

Browser MCP has two parts, and they update independently — how the **extension** updates depends on how you installed it:

| Part | Install method | How it updates |
|------|----------------|----------------|
| **MCP server** | any | **Automatic.** Runs via `npx @agent360/browser-mcp@latest`, so every Claude Code session pulls the newest from npm. Nothing to do. |
| **Extension** | **Chrome Web Store** | **Automatic.** Chrome updates it in the background (usually within a few hours). Nothing to do. |
| **Extension** | **Unpacked** (`npx … install` or manual zip) | **Manual.** Chrome never auto-updates a load-unpacked extension. Re-run `npx @agent360/browser-mcp install`, then open `chrome://extensions` → Browser MCP → **↻ reload**. |

**Not sure which you have?** Open `chrome://extensions` and find Browser MCP. If it shows a **"Loaded from /path/…"** line, it's unpacked (manual updates). If there's no such line, it came from the Chrome Web Store (auto-updates).

**Want zero-maintenance updates?** Install the extension from the [Chrome Web Store](https://chromewebstore.google.com/detail/agent360-browser-mcp/jdehgalffmffhfhmmhaokfbfnafnmgcl), then run `npx @agent360/browser-mcp install --skip-extension` to wire up just the MCP server. After that, both parts stay current on their own.

## Troubleshooting

**"Chrome extension not connected"**
- Check extension is loaded in `chrome://extensions`
- Click the extension popup → "Reconnect"
- Wait 2-3 seconds for port scan

**Screenshot fails**
- Uses Chrome Debugger API (works even when tab isn't focused)
- Falls back to `captureVisibleTab` if debugger unavailable

**Click doesn't work on SPA**
- Try text selector: `browser_click("text=Submit")`
- Uses real mouse events via Chrome Debugger API automatically

**Stale processes**
- Processes auto-exit when Claude Code closes (stdin detection)
- Idle timeout: 4 hours without commands → auto-exit
- Manual cleanup: `lsof -i :9876-9885 | grep LISTEN`

## 💡 Help Shape Browser MCP

Browser MCP is built in the open and shaped by the people using it.

### Browse what others want / built
- 💡 **[Wishlist →](WISHLIST.md)** — features people are asking for
- 🎯 **[Use-cases →](USE_CASES.md)** — what others have built (LinkedIn ICP scraping, vendor research, daily ops, …)

### Contribute in 30 seconds
- 💡 [Wish for a feature](https://github.com/Agent360dk/browser-mcp/issues/new?template=wish.yml)
- 🎯 [Share a use-case](https://github.com/Agent360dk/browser-mcp/issues/new?template=use-case.yml)
- 🐛 [Report a bug](https://github.com/Agent360dk/browser-mcp/issues/new?template=bug.yml)

Or just **ask Claude** — it knows about the `browser_about` tool and will draft + submit on your behalf when you say things like *"I wish browser-mcp could …"* or *"share my browser-mcp use-case"*.

## License

MIT — [Agent360](https://agent360.dk)

browser-mcp

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