The Unofficial Figma Model Context Protocol (MCP) server allows AI assistants to edit Figma design documents, addressing the limitation of the official read-only server. This tool enables collaborative work between designers and AI copilots within Figma documents.

The server provides capabilities for creating components with specific properties, arranging design elements using auto layouts, and organizing entire design documents. It supports creating input text components, password components, and button components with customizable properties like labels and placeholders. Users can build complete forms and design elements through AI commands.

The architecture uses a WebSockets-based polling approach since the Figma Plugin API operates in a sandbox environment. The MCP server communicates with a Figma plugin through a WebSockets server, creating a queue system to match tool calls from AI agents with responses from the plugin. This allows bidirectional communication between the AI assistant and the Figma design document.

The primary benefit is speeding up designers' work by automating repetitive tasks like setting properties on Figma nodes, allowing designers to focus more on the creative aspects of design. It enables designers to prepare drafts, organize documents, and get new inspirations working alongside their AI copilot.

The tool targets designers who want to leverage AI assistance for Figma design work and requires any AI assistant that supports MCP servers. It integrates with Figma through a custom plugin and uses WebSockets technology for communication between components.