The OpenPencil MCP server is the official companion component of the open-source (MIT) OpenPencil design editor, exposing 100+ design tools over stdio or a local HTTP endpoint to clients like Claude Code, Cursor, and Windsurf for headless inspection, editing, and export of .fig/.pen files. The README does not list canonical tool identifiers, so the tool list here is empty. Its eval capability runs the full Figma Plugin API, which grants significant file-modification power and carries scripting risk; the project is an unofficial Figma alternative still under active development.
OpenPencil is an open-source (MIT) design editor that reads and writes .fig and .pen files, ships built-in AI chat, and exposes a headless Vue SDK. Its @open-pencil/mcp package provides an MCP server reachable over stdio (for Claude Code, Cursor, Windsurf) or over a local Unix socket/HTTP endpoint (for scripts and CI). The README states the server exposes 100+ design tools covering node creation/editing, auto-layout, components and variables, boolean operations, design-token analysis, and asset export, but does not enumerate individual tool identifiers, so the tool list is left empty here. File access can be scoped to a directory via the OPENPENCIL_MCP_ROOT environment variable.
npm install -g @open-pencil/mcp.claude mcp add --scope user open-pencil -- openpencil-mcp, or for other MCP clients add {"mcpServers": {"open-pencil": {"command": "openpencil-mcp"}}} to the client config.openpencil-mcp-http; local clients auto-discover the private Unix socket and fall back to http://127.0.0.1:7600/mcp (set PORT=0 on macOS/Linux to disable the TCP fallback).OPENPENCIL_MCP_ROOT to scope file operations (open_file, new_document, export path) to a specific directory; it defaults to the current working directory.mcp__open-pencil__* to permissions.allow in ~/.claude/settings.json.{
"mcpServers": {
"open-pencil": {
"command": "openpencil-mcp"
}
}
}