Ui Annotator Mcp

Ui Annotator Mcp is an open-source MCP (Model Context Protocol) server that enables AI assistants to visually annotate any web page with hover tooltips showing element names, selectors, and dimensions, all without browser extensions or code changes. It acts as a reverse proxy, injecting an annotation script into any site to facilitate seamless communication between users and AI tools. This helps anyone—product managers, QA testers, designers, junior developers, or AI assistants—reference UI components accurately and efficiently for collaborative UI reviews, feedback, and automation. The MCP server exposes programmatic tools (e.g., get_elements, highlight_element, inspect_mode) for AI-driven interaction with web UIs in real time, integrating with MCP-compatible clients such as Claude, Cursor, and others.