Playwright MCP Uses Accessibility Trees to Make Claude Browser Automation More Reliable

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Playwright's MCP server enables AI-driven browser automation by feeding Claude an accessibility tree snapshot instead of a screenshot, eliminating the need for a vision model. Each interactive element receives a stable reference, allowing the agent to target elements precisely rather than inferring from pixels. Accessibility snapshots are significantly more token-efficient, consuming roughly 200–400 tokens compared to thousands for a DOM dump or screenshot. The setup supports Claude Desktop, Cursor, VS Code, and Windsurf, running a headed Chromium browser locally via a stdio subprocess. The approach suits repetitive form flows, data extraction, and regression testing, though elements outside the accessibility tree — such as canvas or custom widgets — remain harder to handle.

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