Font Proof Mcp
io.github.jakeflemingPublished by GitHub account jakeflemingv0.1.0Updated Oct 24, 2026
Create and modify Font Proof documents programmatically (PDF font proofs, live from Glyphs.app).
The publisher's own server: Proof Holdings
Overview
A local MCP server that lets an assistant create and edit Hellbox (formerly Font Proof) .fontproof documents, including PDF font proofs for type designers.
- What you can do
- Create, open and inspect proof documents, and open them in the app for viewing or editing. Add, update, delete, reorder, duplicate and bulk-fill sections, and change section settings. Add or remove fonts, including variable font axes, and list system fonts. List and add fonts from Glyphs 3.
- When to use it
- Useful for type designers on macOS who want an assistant to build or adjust font proof documents and section layouts without clicking through the app, or to pull fonts from Glyphs 3 into a proof.
- Requirements
- macOS 12 or later with the Hellbox app installed, since the server binary ships inside the app bundle. Node.js 18+ for the npx launcher. If Hellbox is not in /Applications or ~/Applications, set FONT_PROOF_MCP_PATH to the server binary path.
Installation
In SourceWeft
- Open Font Proof Mcp in the dashboard and add it to a workspace.
- Enable the server for the chats that should use its tools.
Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.
Other MCP clients
Follow the launch instructions in the repository.
README
font-proof-mcp
Create and modify Hellbox documents programmatically. Hellbox (formerly Font Proof) is a macOS app for type designers that generates PDF font proofs and live-reloads them from Glyphs and RoboFont.
This package launches the MCP server that ships inside the Hellbox 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
- Hellbox installed (the server binary ships inside the app)
- Node.js 18+ (for
npx)
Setup
The easiest path is Hellbox's built-in one-click setup: open Hellbox, go to Preferences, then AI Integration, and click the installer for your client. To set it up manually instead:
Claude Code
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
Cursor
Add the same command / args pair to ~/.cursor/mcp.json.
If Hellbox is installed somewhere other than /Applications or ~/Applications, set FONT_PROOF_MCP_PATH to the full path of Hellbox.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: hellbox.com/docs under "MCP Server".
How it works
The MCP server is a Swift binary embedded in the Hellbox 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.
The package keeps the font-proof-mcp name from the app's Font Proof era; the npm name, the server name MCP clients see, and the .fontproof file extension are all stable across the rename.
Hellbox is made by Minim Industries.
Source: README.md at commit 65cc418
Tools
0Version history
1- v0.1.0LatestSep 16, 2026
Score
50% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
- Reached in the last 30 days25 pts
Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.
- Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
- Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
- DescriptionRequired15 pts
- Logo10 pts
- Documentation15 pts
- License10 pts
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