Plex UI
Figma Kit
Blog

Figma AI Bridge: Design Tokens, Not Just Pixels

Standard Figma MCPs return raw hex and pixel values. AI Bridge returns actual design token bindings — the difference between hardcoded CSS and production-ready code.

Standard Figma MCPs — including the official read-only one — return raw values from your designs. Bridge returns the actual design token variable bindings.

That is the core difference.

The problem with raw values

When an AI reads a Figma button through a standard MCP, it gets:

fills: ['#181818']
borderRadius: 9999px
padding: 0px 16px
gap: 6px
height: 32

No indication that #181818 is background/primary/solid, that 16px is button/pill-gutter/md, or that 9999px is radius/full.

The AI hardcodes these values into CSS. Dark mode breaks. Theme changes require find-and-replace across the codebase. Spacing has no semantic meaning.

What Bridge returns instead

The same button through Bridge get-bound-variables:

{
  "fills": "background/primary/solid",
  "paddingLeft": "button/pill-gutter/md",
  "paddingRight": "button/pill-gutter/md",
  "height": "control/size/md",
  "itemSpacing": "button/gap/lg",
  "topLeftRadius": "radius/full"
}

Now the AI writes var(--color-background-primary-solid) instead of #181818. Your design tokens handle light/dark mode, density scales, and theme changes automatically.

Two-way flow

Bridge is not read-only. It works in both directions:

  1. Code/AI → Figma: create and edit real nodes — frames, text, components, instances.
  2. Figma → Code/AI: read structure, component props, and variable bindings back.

Your AI can create a component in Figma, bind it to design tokens, then read those bindings back to generate CSS — all in one loop.

Model-agnostic

Bridge works with any AI model that can make HTTP calls:

  • Claude, GPT, Cursor, Codex, Gemini, Copilot, Windsurf, and others.
  • Local HTTP API at http://localhost:8867.
  • No vendor lock-in to one assistant.

Local API

GET  http://localhost:8867/status
POST http://localhost:8867/command
POST http://localhost:8867/batch

Send command payload in params (not args). Keep the plugin running in Figma while sending commands.

2-minute setup

  1. In Figma: Plugins → Development → Import plugin from manifest.
  2. Start bridge launcher:
    • macOS: start-bridge.command
    • Windows: start-bridge.bat
  3. Give your model this instruction:
Figma Bridge API: http://localhost:8867
1) GET /status (connected=true)
2) POST /command with {"command":"...","params":{...}}
3) Use params, not args

Pricing

  • One-time purchase, lifetime license.

Reference