Frequently Asked Questions (FAQ) about Playwright MCP Server

Q: What is Playwright MCP Server? A: Playwright MCP (Model Context Protocol) Server is a tool that enables LLMs (Large Language Models) to interact with web pages by using structured accessibility snapshots. It eliminates the need for screenshots or visually-tuned models.

Q: What are the key features of Playwright MCP Server? A: Key features include fast and lightweight operation, LLM-friendly structured data, and deterministic tool application. It avoids ambiguity common with screenshot-based approaches.

Q: What are the requirements to use Playwright MCP Server? A: You need Node.js 18 or newer, and an MCP client such as VS Code, Cursor, Windsurf, or Claude Desktop.

Q: How do I install Playwright MCP Server? A: You can install it via npm with npm install -g @playwright/mcp. Configuration typically involves adding a section in your MCP client settings, pointing to the installed package.

Q: What configuration options are available for Playwright MCP Server? A: Configuration options include setting allowed and blocked origins, specifying the browser to use, running in headless mode, and setting the port for SSE transport, among others.

Q: What are persistent and isolated user profiles? A: Persistent profiles store browsing data between sessions, while isolated profiles start each session with a clean slate.

Q: What is Vision Mode in Playwright MCP Server? A: Vision Mode uses screenshots for visual-based interactions and works best with computer vision models that can interact with elements using X, Y coordinates.

Q: What tools are available in Playwright MCP Server? A: Tools are available for interactions (e.g., click, type), navigation, resource access (e.g., screenshots, PDFs), utilities, tab management, and testing.

Q: How does Playwright MCP Server integrate with UBOS? A: Integration with UBOS allows for orchestrating AI Agents to connect with enterprise data, build custom AI Agents with LLM models, and develop Multi-Agent Systems.

Q: What browsers does Playwright MCP Server support? A: Playwright MCP Server supports Chrome, Firefox, WebKit, and MS Edge.

Q: Can I run Playwright MCP Server in headless mode? A: Yes, you can run the server in headless mode by using the --headless argument.

Q: How do I specify a configuration file for Playwright MCP Server? A: You can specify a configuration file by using the --config command-line option, like this: npx @playwright/mcp@latest --config path/to/config.json.

Q: What is the difference between browser_snapshot and browser_take_screenshot tools? A: browser_snapshot captures an accessibility snapshot, which is better for performance and reliability. browser_take_screenshot takes a visual screenshot of the current page.

Q: How can I use Playwright MCP Server in a Docker container? A: You can use the provided Docker configuration, which supports headless Chromium. Example configuration:

{ “mcpServers”: { “playwright”: { “command”: “docker”, “args”: [“run”, “-i”, “–rm”, “–init”, “–pull=always”, “mcr.microsoft.com/playwright/mcp”] } } }