LocatorLabs MCP Server

# LocatorLabs MCP Server > 🎯 Intelligent Playwright locator generation powered by AI An MCP (Model Context Protocol) server that provides smart locator generation for Playwright test automation. **Works directly in VS Code** (with GitHub Copilot), Cursor, Windsurf, Cline, and Claude Desktop. No extra apps needed - just your favorite IDE! [](https://www.npmjs.com/package/locatorlabs-mcp) [](https://www.npmjs.com/package/locatorlabs-mcp) ### ⚡ Quick Install   **VS Code (v1.99+)** - Copy & run in terminal: ```bash code --add-mcp '{"name":"locatorlabs","command":"npx","args":["-y","locatorlabs-mcp"]}' ``` **Cursor:** ```bash cursor --add-mcp '{"name":"locatorlabs","command":"npx","args":["-y","locatorlabs-mcp"]}' ``` **Windows PowerShell:** ```powershell code --add-mcp '{\"name\":\"locatorlabs\",\"command\":\"npx\",\"args\":[\"-y\",\"locatorlabs-mcp\"]}' ``` ## ✨ Features | Feature | Description | |---------|-------------| | 🎯 **Get Locators** | Get all possible locators for any element (Playwright + Selenium formats) | | 📊 **Analyze Page** | Scan pages and identify all interactive elements | | 🏗️ **Generate POM** | Auto-generate Page Object classes for **Playwright** & **Selenium** | | ✅ **Run Tests** | Execute Playwright tests and get pass/fail results | | 📝 **Generate Tests** | Create executable test scripts | ## 🔧 Supported Frameworks | Framework | Locators | Page Object Model | |-----------|----------|-------------------| | **Playwright** | ✅ `getByRole`, `getByTestId`, etc. | ✅ TypeScript, JavaScript, Python | | **Selenium** | ✅ `By.id`, `By.xpath`, `By.cssSelector` | ✅ Java, Python, C# | ## 🚀 Quick Start ### For VS Code (v1.99+ with GitHub Copilot) **One-Line Install (Mac/Linux):** ```bash code --add-mcp '{"name":"locatorlabs","command":"npx","args":["-y","locatorlabs-mcp"]}' ``` **One-Line Install (Windows PowerShell):** ```powershell code --add-mcp '{\"name\":\"locatorlabs\",\"command\":\"npx\",\"args\":[\"-y\",\"locatorlabs-mcp\"]}' ``` **Or Manual Setup:** 1. Open Command Palette (`Cmd+Shift+P` / `Ctrl+Shift+P`) 2. Type: `MCP: Add Server` 3. Select: `Command (stdio)` 4. Command: `npx` 5. Args: `-y locatorlabs-mcp` **Using with GitHub Copilot:** 1. Enable Agent Mode: Settings → Search `chat.agent.enabled` → Enable 2. Open Copilot Chat (`Ctrl+Cmd+I` / `Ctrl+Alt+I`) 3. Switch to **Agent** mode (dropdown at top) 4. Chat: "Get locators for login button on https://saucedemo.com" ### For Claude Desktop **Step 1:** Open config file - **Mac:** `~/Library/Application Support/Claude/claude_desktop_config.json` - **Windows:** `%APPDATA%\Claude\claude_desktop_config.json` **Step 2:** Add this configuration: ```json { "mcpServers": { "locatorlabs": { "command": "npx", "args": ["-y", "locatorlabs-mcp"] } } } ``` **Step 3:** Restart Claude Desktop ### For Cursor IDE **One-Line Install:** ```bash cursor --add-mcp '{"name":"locatorlabs","command":"npx","args":["-y","locatorlabs-mcp"]}' ``` **Or Manual:** Go to Cursor Settings → MCP → Add new MCP Server - Name: `locatorlabs` - Command: `npx -y locatorlabs-mcp` ### For VS Code + Cline Extension Add to Cline MCP settings: ```json { "mcpServers": { "locatorlabs": { "command": "npx", "args": ["-y", "locatorlabs-mcp"] } } } ``` ## 📖 Usage Examples Just chat naturally: ### Get Locators for an Element > "Get me all locators for the login button on https://www.saucedemo.com" **Response:** | Type | Locator | Reliability | |------|---------|-------------| | testId | `getByTestId('login-button')` | 98% | | role | `getByRole('button', { name: 'Login' })` | 95% | | id | `locator('#login-button')` | 90% | ### Analyze Entire Page > "Analyze all form elements on https://www.saucedemo.com" ### Generate Page Object Model **Playwright:** > "Generate a TypeScript Page Object for https://www.saucedemo.com and call it LoginPage" **Selenium:** > "Generate a Java Selenium Page Object for https://www.saucedemo.com and call it LoginPage" > "Generate a C# Selenium Page Object for https://www.saucedemo.com called LoginPage" > "Generate a Python Selenium POM for https://www.saucedemo.com named LoginPage" ### Run a Test > "Run a test that logs into saucedemo.com with standard_user and secret_sauce, then verify Products page appears" **Response:** ``` ✅ Test PASSED (3.2s) - Navigate to login page ✅ - Enter username ✅ - Enter password ✅ - Click login ✅ - Verify Products visible ✅ ``` ### Generate Test Script > "Generate a Python test script for the saucedemo login flow" ## 🛠️ Available Tools | Tool | Description | |------|-------------| | `get_locators` | Get all possible locators (Playwright + Selenium formats) | | `analyze_page` | List all interactive elements on a page | | `generate_page_object` | Create POM class (Playwright: TS/JS/Python, Selenium: Java/Python/C#) | | `run_test` | Execute tests in real browser, get pass/fail | | `generate_test` | Generate executable test scripts | ## 📦 Supported Languages for Page Objects | Language | Framework | Example Output | |----------|-----------|----------------| | `typescript` | Playwright | `page.getByRole('button')` | | `javascript` | Playwright | `page.getByRole('button')` | | `python` | Playwright | `page.get_by_role('button')` | | `java-selenium` | Selenium | `@FindBy(id = "btn")` | | `python-selenium` | Selenium | `By.ID, "btn"` | | `csharp-selenium` | Selenium | `[FindsBy(How = How.Id)]` | ## 🎯 Supported Test Actions | Action | Description | |--------|-------------| | `navigate` | Go to URL | | `click` | Click element | | `fill` | Enter text | | `clear` | Clear input field | | `check` / `uncheck` | Toggle checkbox | | `select` | Select dropdown option | | `hover` | Mouse hover | | `press` | Keyboard key press | | `assert_visible` | Verify element visible | | `assert_hidden` | Verify element hidden | | `assert_text` | Verify text content | | `assert_value` | Verify input value | | `assert_url` | Verify page URL | | `assert_title` | Verify page title | | `wait` | Wait for time | | `wait_for_element` | Wait for element | | `screenshot` | Capture screenshot | ## 🏆 Locator Priority LocatorLabs ranks locators by reliability: 1. **data-testid** (98%) - Best, explicitly for testing 2. **Role + Name** (95%) - Playwright recommended 3. **Label** (90%) - Accessible 4. **ID** (90%) - Stable if meaningful 5. **Placeholder** (85%) - Good for inputs 6. **Text** (75%) - May change 7. **CSS** (60%) - Can be brittle 8. **XPath** (40%) - Avoid unless necessary ## 🔄 LocatorLabs vs Playwright MCP | Feature | Playwright MCP | LocatorLabs MCP | |---------|----------------|-----------------| | Get all locators for element | ❌ | ✅ | | Locator reliability ranking | ❌ | ✅ | | Selenium locator format | ❌ | ✅ | | Generate Playwright POM | ❌ | ✅ | | Generate Selenium POM (Java/C#/Python) | ❌ | ✅ | | Run tests with pass/fail | ❌ | ✅ | | Browser automation | ✅ | ✅ | | Device emulation | ✅ | ❌ | **They work great together!** Use Playwright MCP for navigation/scraping, LocatorLabs MCP for locators/POMs/tests. ## 📋 Requirements - Node.js 18+ - Playwright browsers (auto-installed on first run) ## 🔧 Troubleshooting ### Playwright browsers not installed ```bash npx playwright install chromium ``` ### Permission issues on Mac ```bash chmod +x ~/.npm/_npx/*/node_modules/.bin/locatorlabs-mcp ``` ### View logs (Claude Desktop) ```bash tail -f ~/Library/Logs/Claude/mcp*.log ``` ### Auto-approve tools in VS Code Add to `settings.json`: ```json { "chat.tools.autoApprove": true } ``` ## 🤝 Contributing Contributions welcome! Please open an issue or PR on GitHub. ## 📺 Author **Naveen AutomationLabs** - YouTube: [@naveenautomationlabs](https://www.youtube.com/@naveenautomationlabs) (500K+ subscribers) - Website: [naveenautomationlabs.com](https://naveenautomationlabs.com) - LinkedIn: [Naveen AutomationLabs](https://linkedin.com/in/naveenkhunteta) ## 📄 License MIT ---