BrandKit MCP

Give every AI tool access to your company's complete brand atomic system via the Model Context Protocol.

BrandKit MCP v2 is an open-source MCP server that exposes a company's complete brand atomic system -- verbal identity (positioning, audience, messaging, differentiation, concepts, voice) and visual identity (colors, typography, components, tokens, motion, assets) -- to Claude and other AI tools via the Model Context Protocol (MCP). It ships 18 tools and 14 resources. When an LLM helps build a website, app, or marketing asset, it has instant structured access to the exact brand language and visual rules it needs -- including a human-authored taste primer that carries the brand's instincts, not just its specs.

Quick Start

# 1. Install
npm install -g brandkit-mcp

# 2. Scaffold a new brand atomic system from the starter template
brandkit-mcp init

# 3. Edit the scaffolded files with your brand content

# 4. Wire into Claude Desktop (or any MCP-compatible client)
#    Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
#    {
#      "mcpServers": {
#        "brandkit": {
#          "command": "brandkit-mcp",
#          "args": ["serve"]
#        }
#      }
#    }

Repository Structure

A brand atomic system lives under a single <brand-root>/ directory (default: ./brand_atomic_system):

<brand-root>/
├── readme.md
├── magic_trick.md               # human-authored taste primer
├── brandkit.config.yaml         # version: 2
├── human/                       # PDFs and human-only material (MCP ignores)
│   └── *.pdf
└── agent/
    ├── verbal/
    │   ├── positioning.md
    │   ├── audience.yaml
    │   ├── messaging.md
    │   ├── differentiation.md
    │   ├── concepts.md
    │   └── voice.md
    └── visual/
        ├── colors_and_type.css
        ├── fonts/
        ├── assets/
        ├── components/
        ├── tokens/
        ├── motion/
        │   ├── motion.json
        │   └── motion.css
        └── artifacts/
            ├── web/             # override layer
            └── product/         # override layer

The human/ directory is intentionally ignored by the MCP server -- put PDFs, print specs, or any other human-only material there. Everything under agent/ is indexed and served.

MCP Tools Reference

BrandKit MCP exposes 18 tools to AI assistants:

Tool	Description
`get_brand_overview`	High-level overview + taste primer
`get_magic_trick`	Verbatim magic_trick.md
`get_positioning`	Positioning document
`get_audience`	Audience YAML, parsed
`get_messaging`	Messaging document
`get_differentiation`	Differentiation document
`get_concepts`	Creative concepts/directions
`get_voice`	Voice document
`get_colors_and_type`	Colors + typography custom properties
`get_assets`	Logos + brand assets
`get_fonts`	Font faces
`get_components`	UI primitives
`get_tokens`	Token specimens
`get_motion`	Motion system (json + css)
`get_css`	colors_and_type.css + motion.css text
`search_brand`	Full-text search
`validate_usage`	Validate brand compliance
`get_context_diff`	Diff base vs web vs product

Taste primer

Seven creative/verbal tools (get_brand_overview, get_positioning, get_audience, get_messaging, get_differentiation, get_concepts, get_voice) inject a _taste_primer field carrying magic_trick.md verbatim. get_magic_trick returns the primer directly without wrapping.

MCP Resources

BrandKit MCP exposes 14 brand:// URIs as MCP resources:

URI	Description
`brand://overview`	Brand overview
`brand://magic_trick`	Taste primer
`brand://verbal/positioning`	Positioning document
`brand://verbal/audience`	Audience YAML
`brand://verbal/messaging`	Messaging document
`brand://verbal/differentiation`	Differentiation document
`brand://verbal/concepts`	Creative concepts
`brand://verbal/voice`	Voice document
`brand://visual/colors_and_type`	Colors + typography CSS
`brand://visual/assets`	Asset index
`brand://visual/fonts`	Font face index
`brand://visual/components`	Component index
`brand://visual/tokens`	Token specimens
`brand://visual/motion`	Motion system

Configuration

The brandkit.config.yaml file at your project root controls BrandKit MCP:

version: 2
brand:
  name: Acme Corp
  description: Plumbing for builders.
  root: ./brand_atomic_system
contexts: [base, web, product]
ignore:
  - human/

version: 2 is required. A config file missing this field or declaring version: 1 causes the server to throw BrandkitV1ConfigError at startup.

Context System

BrandKit v2 supports three contexts:

Context	Purpose
`base`	Shared foundation -- fonts, core colors, global tokens
`web`	Overrides for the public-facing website (`agent/visual/artifacts/web/`)
`product`	Overrides for the SaaS application (`agent/visual/artifacts/product/`)

Verbal content (agent/verbal/) has no context overrides -- it applies globally. Visual content can be overridden per context via the artifacts/ layer.

Migrating from v1

2.0.0 is a breaking release. The directory layout, context vocabulary, and tool surface have all changed. No automated migration is included -- the path mapping is manual:

v1 path	v2 path
`brand/shared/colors/*.css`	`agent/visual/colors_and_type.css`
`brand/shared/typography/*.css`	`agent/visual/colors_and_type.css`
`brand/shared/logos/*`	`agent/visual/assets/`
`brand/shared/components/*.md`	`agent/visual/components/*.md`
`brand/shared/voice/brand-voice.md`	`agent/verbal/voice.md`
`brand/shared/guidelines/*.md`	`agent/verbal/{positioning,messaging,differentiation,concepts}.md`
`brand/marketing/*`	`agent/visual/artifacts/web/*`
`brand/product/*`	`agent/visual/artifacts/product/*`

Your brandkit.config.yaml must also be updated to declare version: 2 and use the new brand.root field. v1 configs throw BrandkitV1ConfigError at startup -- the server will not start until the config is updated.

Conventions

magic_trick.md is human-authored. The MCP reads it but no tool writes to it. If write tools are added in a future version, they must denylist this path. The taste primer is the brand's instincts -- it must stay human.

Token output formats. The get_tokens tool supports CSS custom properties, SCSS variables, Tailwind config, W3C Design Tokens, and flat JSON.

Transports. The server supports stdio (recommended for Claude Desktop), SSE (legacy HTTP), and Streamable HTTP (current MCP spec).

CLI Reference

brandkit-mcp <command> [options]

Commands:
  init [directory]      Scaffold a brand atomic system from the starter template
  validate [config]     Validate configuration and scan for issues
  serve                 Start the MCP server
  preview               Start the local preview server
  docs                  Generate project documentation files

Global Options:
  --version             Show version number
  --help                Show help

Contributing

Contributions are welcome.

git clone https://github.com/ejwhite7/brandkit-mcp
cd brandkit-mcp
npm install
npm run build
npm test

TypeScript strict mode
ESM imports with .js extensions
No any types -- use proper interfaces
Tests use Vitest

License

MIT -- see LICENSE for details.

Built with the Model Context Protocol by Anthropic.