Font Proof

Create and modify Font Proof documents programmatically. Font Proof is a macOS app for type designers that generates PDF font proofs and live-reloads them from Glyphs.app.

This package launches the MCP server that ships inside the Font Proof app bundle. The server lets AI tools create and edit .fontproof documents directly; the app does not need to be running.

Requirements

• macOS 12 or later
• Font Proof installed (the server binary ships inside the app)
• Node.js 18+ (for npx)

Setup

The easiest path is Font Proof's built-in one-click setup: open Font Proof, go to Preferences, then AI Integration, and click the installer for your client. To set it up manually instead:

Claude Code

claude mcp add font-proof -- npx -y font-proof-mcp

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "font-proof": {
      "command": "npx",
      "args": ["-y", "font-proof-mcp"]
    }
  }
}

Cursor

Add the same command / args pair to ~/.cursor/mcp.json.

If Font Proof is installed somewhere other than /Applications or ~/Applications, set FONT_PROOF_MCP_PATH to the full path of Font Proof.app/Contents/Helpers/font-proof-mcp.

Tools

• Documents: create_proof, create_complete_proof, open_proof, get_proof_info, open_in_app
• Sections: add_section, update_section, delete_section, reorder_sections, duplicate_section, set_section_content_bulk, update_section_settings
• Fonts: add_fonts, remove_fonts, list_system_fonts (variable font axes supported)
• Glyphs 3: list_glyphs_fonts, add_glyphs_fonts

Full documentation: fontproof.com/docs under "MCP Server".

How it works

The MCP server is a Swift binary embedded in the Font Proof app at Contents/Helpers/font-proof-mcp, codesigned with the app and always in sync with the app's document format. This package is a thin launcher: it finds that binary and hands over stdio. No server logic is duplicated here, so the tools you get always match the app version you have installed.

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Font Proof is made by Minim Industries.