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kenneives

design-token-bridge-mcp

by kenneives

design-token-bridge-mcp

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An MCP server that translates design tokens between platforms. Extract tokens from Tailwind, CSS, Figma, or W3C DTCG format — then generate native themes for Material 3 (Kotlin), SwiftUI (with Liquid Glass), Tailwind, and CSS Variables.

Built for the v0 → Figma → Claude Code design pipeline.

┌──────────────┐     ┌──────────────┐     ┌────────────────────────┐
│  Tailwind     │     │              │     │  Material 3 (Kotlin)   │
│  CSS Vars     │────▶│  Universal   │────▶│  SwiftUI (Swift)       │
│  Figma Vars   │     │  Token       │     │  Tailwind Config       │
│  W3C DTCG     │     │  Schema      │     │  CSS Variables         │
└──────────────┘     └──────────────┘     └────────────────────────┘
    Extractors           Bridge              Generators

Install

From npm

npm install -g design-token-bridge-mcp

From source

git clone https://github.com/kenneives/design-token-bridge-mcp.git
cd design-token-bridge-mcp
npm install && npm run build

Related MCP server: Chuk Design System

Configure with Claude Code

Add to your Claude Code MCP settings (~/.claude/settings.json or project .mcp.json):

{
  "mcpServers": {
    "design-token-bridge": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "design-token-bridge-mcp"]
    }
  }
}

Or if installed from source:

{
  "mcpServers": {
    "design-token-bridge": {
      "type": "stdio",
      "command": "node",
      "args": ["/path/to/design-token-bridge-mcp/build/index.js"]
    }
  }
}

Tools (9 total)

Extractors — Input → Universal Tokens

Tool

Input

Description

extract_tokens_from_tailwind

tailwind.config.js content

Parses colors, fontSize, spacing, borderRadius, boxShadow

extract_tokens_from_css

CSS file content

Extracts --color-*, --space-*, --radius-*, --shadow-* custom properties

extract_tokens_from_figma_variables

Figma Variables API JSON

Parses COLOR, FLOAT types, resolves aliases, handles multi-mode

extract_tokens_from_json

W3C DTCG format JSON

Parses $value/$type/$description, resolves {aliases}, handles groups

Generators — Universal Tokens → Output

Tool

Output

Description

generate_material3_theme

Kotlin (Jetpack Compose)

lightColorScheme(), Typography, Shapes with M3 naming

generate_swiftui_theme

Swift (SwiftUI)

Color extensions, Font structs, optional Liquid Glass (iOS 26+)

generate_tailwind_config

tailwind.config.js

Theme extend block with rem units, ESM or CJS

generate_css_variables

CSS custom properties

:root block with light/dark mode via prefers-color-scheme

Validation

Tool

Description

validate_contrast

WCAG AA/AAA contrast checking for color pairs with pass/fail + ratios

Universal Token Schema

All tools speak this common format:

{
  "colors": {
    "primary": { "value": "#6750A4", "description": "Brand primary", "category": "primary" }
  },
  "typography": {
    "display-large": { "fontSize": 57, "lineHeight": 64, "fontWeight": 400, "fontFamily": "Inter" }
  },
  "spacing": { "xs": 4, "sm": 8, "md": 16 },
  "radii": { "sm": 8, "md": 12, "lg": 16 },
  "elevation": {
    "low": {
      "shadowColor": "#000000",
      "shadowOffset": { "x": 0, "y": 2 },
      "shadowRadius": 4,
      "shadowOpacity": 0.1
    }
  },
  "motion": {
    "fast": { "duration": 150, "easing": "ease-out" }
  }
}

Example: Full Pipeline

1. Extract tokens from a Tailwind config

Use extract_tokens_from_tailwind with the contents of my tailwind.config.js

2. Generate native themes from the extracted tokens

Take those tokens and run them through:
- generate_tailwind_config (for the web app)
- generate_material3_theme (for Android)
- generate_swiftui_theme with liquidGlass=true (for iOS)
- generate_css_variables (for a vanilla CSS fallback)

3. Validate accessibility

Run validate_contrast on those tokens at AAA level

Example Output

See the examples/qt-games/ directory for a complete responsive landing page built entirely from MCP-generated tokens, including:

  • qt-games-tokens.json — extracted universal tokens

  • tailwind.config.js — generated Tailwind config

  • variables.css — generated CSS custom properties

  • contrast-report.json — WCAG validation (AAA pass)

  • index.html + styles.css — responsive landing page using the generated tokens

v0 + Figma Free Tier Setup

This MCP works with free tiers of both v0 and Figma. See the setup guides:

Tech Stack

  • TypeScript + Node.js

  • @modelcontextprotocol/sdk v1.x (stdio transport)

  • Zod for schema validation

  • Zero heavyweight dependencies — no Babel, no PostCSS, no Style Dictionary

Tests

# 91 unit tests
npm test

# 31 Playwright visual/responsive tests
npm run test:e2e

Contributing

See CONTRIBUTING.md for development setup, project structure, and PR guidelines.

License

MIT — see LICENSE.

Install Server
A
license - permissive license
A
quality
B
maintenance

Maintenance

Maintainers
76dResponse time
6dRelease cycle
2Releases (12mo)
Commit activity

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