Browser & File Server

Give Claude Code browser and file superpowers. This MCP server bridges Claude Code (or any MCP client) with a real browser via Playwright and adds the ability to read Excel, Word, PowerPoint, CSV, and image files — all from the command line.

The Problem

Claude Code lives in the terminal. It can write code, run scripts, and manage files — but it can't interact with the web. Need to test a UI? Check a deployment? Scrape dynamic content? You have to switch contexts manually.

The Solution

This MCP server gives Claude Code a full browser automation toolkit and file reading capabilities. Claude Code can now:

• Navigate to any URL and read page content
• Click buttons, links, and interactive elements
• Type into forms with realistic keystroke simulation
• Screenshot pages or specific elements (returned as base64 PNG)
• Find elements by CSS selector, text, XPath, or ARIA role
• Execute JavaScript in the page context
• Manage tabs — open, close, switch between them
• Scroll, hover, wait — full interactive control
• Read Excel workbooks — sheets, headers, data as markdown tables
• Read Word documents — text, headings, tables
• Read PowerPoint presentations — slide text, tables, speaker notes
• Read CSV files — with configurable delimiters and encoding
• Read images — JPG, PNG, GIF, BMP, WebP, TIFF returned as base64 for Claude's vision
• Inspect files — metadata, size, type, modification date

What is MCP?

Model Context Protocol is an open standard created by Anthropic that lets AI models connect to external tools and data sources through a unified interface. Think of it like USB-C for AI: a standardized plug that lets any MCP client (Claude Code, Claude Desktop, etc.) talk to any MCP server (a browser automation tool, a database connector, a Slack integration, whatever).

The key pieces:

• MCP Server — Exposes "tools" (functions the AI can call), "resources" (data it can read), and "prompts" (templates). That's what this project is: a server that exposes browser_navigate, browser_click, browser_screenshot, etc.
• MCP Client — The AI application that discovers and calls those tools. Claude Code and Claude Desktop are both MCP clients.
• Transport — How they communicate: stdio for local processes (what this server uses) or streamable HTTP for remote/networked servers.

The practical upshot: instead of every AI tool building its own proprietary plugin system, MCP gives you one protocol. Write a server once, and it works with any compliant client. This browser server works with Claude Code today and any future MCP-compatible agent.

Quick Start

1. Install

Linux / macOS:

cd Claude_Browser_MCP_Server
chmod +x install.sh
./install.sh

Windows:

cd Claude_Browser_MCP_Server
python -m venv .venv
.venv\Scripts\pip install -r requirements.txt
.venv\Scripts\playwright install chromium

This creates a virtual environment, installs dependencies, and downloads Chromium.

2. Configure Claude Code

Option A — CLI (recommended):

claude mcp add browser -s user -e BROWSER_HEADLESS=false -- /path/to/.venv/bin/python /path/to/browser_mcp.py

On Windows:

claude mcp add browser -s user -e BROWSER_HEADLESS=false -- C:\path\to\.venv\Scripts\python.exe C:\path\to\browser_mcp.py

Option B — Manual config:

Add to your project-level .mcp.json:

{
    "mcpServers": {
        "browser": {
            "command": "/path/to/.venv/bin/python",
            "args": ["/path/to/browser_mcp.py"],
            "env": {
                "BROWSER_HEADLESS": "false"
            }
        }
    }
}

Or add to global ~/.claude/settings.json under the same mcpServers key.

3. Use It

In Claude Code, just ask it to do browser things:

> Go to https://myapp.dev and check if the login page loads correctly
> Navigate to the admin dashboard and take a screenshot
> Fill out the contact form on our website with test data
> Check what our competitor's pricing page looks like

Claude Code will automatically use the browser tools when appropriate.

Available Tools (25)

Browser Tools (18)

Tool	Description
browser_navigate	Go to a URL, returns title and HTTP status
browser_click	Click elements by selector, text, or XPath
browser_type	Type into inputs with keystroke simulation
browser_fill	Instantly fill form fields (no keystrokes)
browser_select	Select dropdown options by value or label
browser_hover	Hover to reveal tooltips/menus
browser_scroll	Scroll page or specific elements
browser_wait	Wait for elements or fixed delays
browser_screenshot	Capture page/element as base64 PNG
browser_find	Find elements by selector, text, or ARIA role
browser_get_text	Extract text content from page/element
browser_get_html	Get raw HTML content
browser_evaluate	Execute arbitrary JavaScript
browser_keyboard	Press keys and keyboard shortcuts
browser_back	Navigate back in history
browser_forward	Navigate forward in history
browser_tabs	Create, close, list, switch tabs
browser_page_info	Get URL, title, viewport, element counts

File Tools (7)

Tool	Description
file_info	File metadata: size, type, modified date, readability
file_list_sheets	List all sheet names and dimensions in an Excel workbook
file_read_excel	Read Excel sheets as markdown tables (configurable rows, start position)
file_read_csv	Read CSV files as markdown tables (configurable delimiter, encoding)
file_read_word	Extract text, headings, and tables from .docx files
file_read_powerpoint	Extract slide text, tables, and speaker notes from .pptx files
file_read_image	Read images as base64 PNG for Claude's vision (auto-resizes large images)

Configuration

Environment variables (set in the env block of your MCP config):

Variable	Default	Description
BROWSER_HEADLESS	true	Set false to see the browser window
BROWSER_VIEWPORT_WIDTH	1280	Browser viewport width in pixels
BROWSER_VIEWPORT_HEIGHT	720	Browser viewport height in pixels
BROWSER_TIMEOUT	30000	Default timeout in milliseconds
BROWSER_TYPE	chromium	Browser engine: chromium, firefox, webkit

Example Workflows

QA Testing

"Navigate to localhost:3000, log in with test credentials,
 go to the dashboard, and screenshot any error states"

Competitive Research

"Go to competitor.com/pricing, extract their plan names and prices,
 then check their features page"

Form Automation

"Fill out the insurance quote form on our staging site with
 these test values: Name=John Doe, DOB=1990-01-15, ..."

Web Scraping

"Navigate to the job board, find all Python developer positions
 posted this week, and extract the company names and salaries"

Read a Spreadsheet

"Read the Excel file at C:\Reports\Q1_sales.xlsx and summarize the data"
"List all sheets in the workbook and show me the first 50 rows of the Summary tab"

Analyze an Image

"Look at the screenshot at C:\Users\gregg\Desktop\error.png and tell me what the error is"
"Read the architecture diagram at C:\docs\system_diagram.jpg and describe the components"

Process Documents

"Read the Word doc at C:\proposals\draft.docx and check for any inconsistencies"
"Extract all the slide content from the PowerPoint at C:\presentations\quarterly.pptx"

How Selectors Work

The tools accept flexible selectors:

• CSS: #login-button, .nav-link, input[name='email']
• XPath: //button[@type='submit']
• Text: text=Sign In or just Sign In (auto-detected)
• Role: Use browser_find with role='button'
• Playwright: button >> text=Submit, .form >> input

If a CSS/XPath selector finds nothing, it automatically falls back to text matching.

Architecture

Claude Code (CLI)
    |
    +-- MCP Protocol (stdio)
    |
    v
Browser MCP Server (Python)
    |
    +-- FastMCP (tool registration + validation)
    +-- Pydantic (input validation)
    |
    v
Playwright (async)
    |
    v
Chromium Browser

The server maintains a persistent browser instance across tool calls using FastMCP's lifespan management. The browser launches once when the MCP connection starts and closes when it ends.

Compatibility

• Python: 3.10+
• MCP SDK: 1.26.0+
• Playwright: 1.58.0+
• openpyxl: 3.1.0+ (Excel)
• python-docx: 1.1.0+ (Word)
• python-pptx: 1.0.0+ (PowerPoint)
• Pillow: 10.0.0+ (Images)
• Platforms: Windows, macOS, Linux

Troubleshooting

"Playwright browsers not installed"

cd Claude_Browser_MCP_Server && source .venv/bin/activate  # Linux/macOS
# or: .venv\Scripts\activate  # Windows
playwright install chromium
sudo playwright install-deps chromium  # Linux system deps

"Connection refused" / Server not starting

• Check the path in your MCP config points to the correct .venv/bin/python (Linux/macOS) or .venv\Scripts\python.exe (Windows)
• Ensure the virtual environment was created successfully
• Try running manually: .venv/bin/python browser_mcp.py
• Check server status: claude mcp list

Headless mode on Linux server

"env": {
    "BROWSER_HEADLESS": "true"
}

Timeouts on slow pages

"env": {
    "BROWSER_TIMEOUT": "60000"
}

Companion Project: Claude Code IDE

This MCP server is designed to work with the Claude Code IDE — a full web-based IDE that wraps Claude Code's CLI with project management, session recording, and a multi-tab interface.

When used together:

• File upload with auto-ingestion — Click the upload button in the IDE, select a file (Excel, Word, PowerPoint, image, CSV), and it drops into the project's working directory. The IDE automatically prompts Claude to read it using this server's file tools. No copy-pasting, no file paths to type.
• Zero configuration — Claude Code discovers this MCP server automatically via ~/.claude/settings.json. Start a session in the IDE and all 25 tools are available immediately.
• Session persistence — The IDE records every conversation, cleans the raw terminal output through a virtual terminal emulator, and lets you resume sessions natively. The MCP tools are available across resumed sessions without reconnecting.
• Working directory awareness — Each IDE project has a configured working directory. Files uploaded through the IDE land in that directory, and file tool paths resolve relative to where Claude Code is actually running.

The IDE handles the UI, session management, and PTY process lifecycle. This server handles browser automation and file processing. They communicate through Claude Code's MCP protocol — the IDE never talks to this server directly.

License

MIT — do whatever you want with it.