Playwright MCP

# Playwright MCP Skill

Browser automation powered by Playwright MCP server. Control Chrome, Firefox, or WebKit programmatically.

Installation

```bash npm install -g @playwright/mcp # Or npx @playwright/mcp ```

Install browsers (first time): ```bash npx playwright install chromium ```

Quick Start

Start MCP Server (STDIO mode) ```bash npx @playwright/mcp ```

Start with Options ```bash # Headless mode npx @playwright/mcp --headless

# Specific browser npx @playwright/mcp --browser firefox

# With viewport npx @playwright/mcp --viewport-size 1280x720

# Ignore HTTPS errors npx @playwright/mcp --ignore-https-errors ```

Common Use Cases

1. Navigate and Extract Data ```python # MCP tools available: # - browser_navigate: Open URL # - browser_click: Click element # - browser_type: Type text # - browser_select_option: Select dropdown # - browser_get_text: Extract text content # - browser_evaluate: Run JavaScript # - browser_snapshot: Get page structure # - browser_close: Close browser ```

2. Form Interaction ``` 1. browser_navigate to form URL 2. browser_type into input fields 3. browser_click to submit 4. browser_get_text to verify result ```

3. Data Extraction ``` 1. browser_navigate to page 2. browser_evaluate to run extraction script 3. Parse returned JSON data ```

MCP Tools Reference

| Tool | Description | |------|-------------| | `browser_navigate` | Navigate to URL | | `browser_click` | Click element by selector | | `browser_type` | Type text into input | | `browser_select_option` | Select dropdown option | | `browser_get_text` | Get text content | | `browser_evaluate` | Execute JavaScript | | `browser_snapshot` | Get accessible page snapshot | | `browser_close` | Close browser context | | `browser_choose_file` | Upload file | | `browser_press` | Press keyboard key |

Configuration Options

```bash # Security --allowed-hosts example.com,api.example.com --blocked-origins malicious.com --ignore-https-errors

# Browser settings --browser chromium|firefox|webkit --headless --viewport-size 1920x1080 --user-agent "Custom Agent"

# Timeouts --timeout-action 10000 # Action timeout (ms) --timeout-navigation 30000 # Navigation timeout (ms)

# Output --output-dir ./playwright-output --save-trace --save-video 1280x720 ```

Examples

Login to Website ``` browser_navigate: { url: "https://example.com/login" } browser_type: { selector: "#username", text: "user" } browser_type: { selector: "#password", text: "pass" } browser_click: { selector: "#submit" } browser_get_text: { selector: ".welcome-message" } ```

Extract Table Data ``` browser_navigate: { url: "https://example.com/data" } browser_evaluate: { script: "() => { return Array.from(document.querySelectorAll('table tr')).map(r => r.textContent); }" } ```

Screenshot ``` browser_navigate: { url: "https://example.com" } browser_evaluate: { script: "() => { document.body.style.zoom = 1; return true; }" } # Screenshot saved via --output-dir or returned in response ```

Security Notes

• By default restricts file system access to workspace root
• Host validation prevents navigation to untrusted domains
• Sandboxing enabled by default (use `--no-sandbox` with caution)
• Service workers blocked by default

Troubleshooting

```bash # Update browsers npx playwright install chromium

# Debug mode npx @playwright/mcp --headless=false --output-mode=stdout

# Check installation playwright-mcp --version ```

Links

• Playwright Docs
• MCP Protocol
• NPM Package