Better Design

A design harness for AI coding agents.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Find Design: Search the Better Design catalog for an existing design system and return its ID. For building an app, prefer create-design-system to generate the user's own brand.
  • Get Design System Docs: Scaffolds a design system into the user's project. Returns the complete styling, tokens, and themed components for a chosen design system.
  • Get Ui Principle: Load UI design principles and guidelines into context on-demand. Use when you need guidance on visual hierarchy, typography, color, spacing, depth, or interactions.

What data it sees

Do you need an account

No: the server works without sign-in

A design harness for AI coding agents. Better Design gives your agent design systems, UI and UX principles, icons and UI review. Describe your product and it shows design systems that fit, or creates a custom one from a description or your website, then installs the components. It explains how sign-up, forms, onboarding and error messages should work, and reviews finished screens for hard-to-read text, hard-to-find buttons and unclear copy.

Sign in with a free Better Design account (OAuth). Custom design systems use credits.

How to connect

How to connect Better Design to Claude

The server address to paste into Claude settings:

https://better-design--marvinkr.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Better Design to ChatGPT

The server address to paste into ChatGPT settings:

https://better-design--marvinkr.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Better Design to Cursor

The server address to paste into Cursor settings:

https://better-design--marvinkr.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (8)

Raw names from tools/list. Only developers need these.

find-designSearch the Better Design catalog for an existing design system and return its ID. For building an app, prefer create-design-system to generate the user's own brand.
get-design-system-docsScaffolds a design system into the user's project. Returns the complete styling, tokens, and themed components for a chosen design system.
get-ui-principleLoad UI design principles and guidelines into context on-demand. Use when you need guidance on visual hierarchy, typography, color, spacing, depth, or interactions.
resolve-icon-librarySearch for icon libraries matching a design style or personality using semantic search.
search-iconsSearch for specific icons within an icon library by name or semantic concept.
get-review-rulesRetrieves accessibility (WCAG 2.1), visual design, animation, content, comprehension, and AI feature review rules for analyzing code.
check-comprehensionChecks a finished interface against the mom test, the 15 second test, and the screenshot test, so copy that only makes sense inside the team is caught before the screen is presented.
extract-design-systemDistill an oklch-normalized semantic token set out of a project's existing CSS so new components match the app the user already built. Paste the contents of globals.css (or a Tailwind v4 @theme block).