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@LE-VAI

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About Designesy

Design-system contract verification & scoring for AI agents. 34-check engine (99.1% A self-score), DTCG token validation, WCAG 2.2 a11y, Lottie motion. 11 tools, no auth.

#design-system#verification#ai-agents#accessibility#design-tokens#mcp#scoring#wcag#lottie#contract#qa

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "designesy": {
      "url": "https://www.designesy.org/api/mcp"
    }
  }
}

Tools

No tools detected

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is Designesy?

Designesy is a design-system contract verification platform. It scores any website against a 34-check deterministic engine covering accessibility, design tokens, motion, typography, and semantic HTML. No LLM — every check is deterministic and reproducible.

How to use

claude mcp add designesy --transport http https://www.designesy.org/api/mcp

Then ask your AI client: "Score https://stripe.com against the designesy contract."

Key features

  • 11 MCP tools — score sites, validate tokens, audit accessibility, verify Lottie motion, fetch contracts and reviews
  • 34-check engine — deterministic, no LLM, reproducible scores from 0-100 with A-F grades
  • Self-scores 99.1% A — the engine passes its own contract
  • Live leaderboard — 30 sites scored (Linear, Stripe, Vercel, GitHub, Figma, Notion, and more)
  • Full methodology — every check documented at designesy.org/methodology

Live endpoints

  • Site: designesy.org
  • MCP endpoint: designesy.org/api/mcp (Streamable HTTP, no auth)
  • Score any site: designesy.org/score
  • Leaderboard: designesy.org/leaderboard
  • Methodology: designesy.org/methodology

Use cases

  • Verify a design system meets contract standards before shipping
  • Score competitor sites and benchmark your design against frontier references
  • Validate DTCG design token files against the W3C 2025.10 format
  • Audit WCAG 2.2 AA accessibility with axe-core 4.12.1
  • Verify Lottie animations against the spec and motion standards
  • Fetch the designesy design-system contract for AI-assisted design work

Comments

Basic information

Category

Media & Design

Author

LE-VAI

Submitted by

LE-VAI

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