Open-source MCP Server

Design intelligence
for every prompt

Raven gives AI the design knowledge that used to live only in senior designers' heads. Accessibility, principles, patterns, tokens, and strategy—thirteen tools, three knowledge layers.

Install Raven Explore Tools

One tool. Every industry.

Click any demo — built entirely with Raven's design intelligence

Legal
Harrison & Cole
Full-service litigation firm
Wedding
Elara & Co.
Luxury wedding planning
Food & Beverage
Ember & Grain
Specialty coffee roaster
SaaS
Flux
Real-time analytics platform
Fitness
FORGE
Performance training studio
Real Estate
Oleander Residence
$12.5M luxury estate listing
73
Design principles
Accessibility, Nielsen, Gestalt, Laws of UX, Architecture
13
UI patterns
With do's, don'ts & evidence
12
Design systems
Apple, Google, Stripe, Airbnb & more
13
MCP tools
Auto-called by Claude

The Story

Named for the creature that bridges worlds

Across Norse, Celtic, and Native American traditions, the raven carries knowledge from hidden places and brings it into the light.

Odin's ravens Huginn and Muninn—Thought and Memory—fly across all nine realms at dawn and return to whisper everything they've seen. The Morrígan takes raven form to decide fate. Yéil stole the sun from darkness and gave it to everyone.

Raven MCP: design intelligence that used to be locked away, now flying across your work.

Raven
Norse

Huginn & Muninn

Thought & Memory—Odin's ravens that fly across all nine realms and return with knowledge

Celtic

The Morrígan

Sovereignty & Prophecy—the triple goddess who takes raven form to decide fate

Tlingit

Yéil the Transformer

Light from Darkness—Raven stole the sun, moon, and stars and gave them to everyone

claude — raven-mcp

Three Knowledge Layers

Everything a senior designer knows

From universal laws of perception to battle-tested business strategy—structured for machines to query and apply.

73
Design principles

Principles

Nielsen's Heuristics, Laws of UX, Gestalt, WCAG accessibility, typography, color theory, mobile UX, responsive layout, component architecture, and D4D—with violations and checklists.

Accessibility Nielsen Gestalt Laws of UX Mobile UX Responsive
13
Interface types

Patterns

Proven UI patterns for signup, pricing, dashboards, forms, navigation, CTAs, and more—each with do's, don'ts, and evidence.

Landing Pages Pricing Forms Navigation
5
Strategy domains

Business Strategy

Monetization, retention, onboarding, growth, and metrics—the business context that shapes every design decision.

Monetization Retention Growth Metrics

Thirteen Tools

The full flight across all realms

Each tool is a focused query. Claude calls them automatically—no special syntax, no configuration beyond install.

get_principles
Design principles matched to your UI context—heuristics, laws, accessibility, color theory
get_pattern
Proven patterns with do's, don'ts, and evidence for 13 interface types
get_business_strategy
Monetization, retention, onboarding, growth, and metrics frameworks
evaluate_design
Score a design description against relevant principles and patterns
search_knowledge
Full-text search across all principles, patterns, and business strategy
get_checklist
Pre-publish quality checklist for any UI type—raise the raven banner
get_d4d_framework
Design for Delight—customer empathy, hypothesis, and experiment templates
list_design_systems
Browse the registry of 12 design systems with tokens and metadata
get_design_system
Full tokens—colors, typography, spacing, radii, elevation, motion
compose_system
Mix tokens from multiple design systems into a custom composition
audit_page
Score any HTML page against Raven's design quality standards — typography, accessibility, responsive, tokens
get_brand_system
Get a complete design system for building an app with branding like any company
generate_design_system
Generate a complete design system from a brand color—export as HTML, CSS, Figma, or SVG
"

Design knowledge was locked in bentwood boxes—agency playbooks, enterprise design system teams, senior designers' heads. Raven broke the boxes open. Light for everyone.

The origin story — Tlingit mythology of Yéil, the Raven who stole the sun

How It Works

Three steps to design-grade AI

1

Install

Clone, build, and add to your MCP config. Two minutes.

npm install && npm run build
2

Prompt

Ask Claude to build any UI. Raven's tools are called automatically.

claude "design a dashboard"
3

Ship

Get UI grounded in real principles, proven patterns, and production tokens.

✓ Design-system grade

Token Registry

The world's best design systems, queryable

Production tokens from 12 world-class design systems in W3C DTCG format. Platforms, products, and frameworks — all queryable.

Apple HIG
Platform
iOSmacOSpremium
Material Design 3
Platform
Androiddynamic-color
Stripe
Fintech
professionalclean
Linear
Productivity
darkminimal
Airbnb
Consumer
warmtrustworthy
Spotify
Consumer
darkvibrant
Vercel
Developer
monochromeminimal
GitHub Primer
Developer
enterpriseaccessible
Notion
Productivity
warmcontent-first
shadcn/ui
Component Library
tailwindradix
Tailwind CSS
Framework
utility-firstcomprehensive
Supabase
Developer
darkgreen-accent

Open Source

Free. All of it.

Every tool, every token, every principle — no limits, no tiers, no catch. Raven is open source and always will be.

13 Tools
73 Principles
12 Design Systems
13 UI Patterns

Design intelligence for every AI-generated interface — accessibility audits, token systems, evaluation scoring, and more. Install in 30 seconds.

Get Started View on GitHub

Need something custom?

Custom Design Systems

Get a bespoke Raven-compatible design system built for your brand — tokens, principles, evaluation rules, all tailored to your product.

Get in touch →

Get Started

Give your AI
design intelligence

Open source. Zero runtime dependencies. Works with Claude Code and Claude Desktop.

Install Raven