Ray Group DeFi UX MCP Server

An MCP server that gives AI agents direct access to the Ray Group DeFi UX rubric, named patterns, and cognitive-bias glossary — the same framework used in Ray Group's audits and taught at EthCC, ETH Prague, and ETH Milan.

Use it in Claude Desktop, Cursor, Codex, or any other MCP-compatible AI client to ground UX assessments in a published, opinionated framework rather than generic advice.

Status: v0.1, free tier. Premium tier (extended corpus, screenshot-based audit feedback, named-protocol case studies) on the roadmap. Join the waitlist at raygroup.uk/products/defi-ux-mcp.

What's inside

Five tools, exposed over stdio:

The free-tier corpus ships with:

• The full 8-area DeFi UX rubric (cognitive-bias-resistance, risk-disclosure, transaction-confirmation, fee-slippage-transparency, error-failure-states, onboarding-first-tx, novice-expert-split, mobile-ux)

• 10 named patterns spanning onboarding, transactions, risk, wallets, trading, errors, and novice/expert splits

• 5 cognitive-bias glossary entries (anchoring, loss aversion, action bias, framing effect, choice overload) with DeFi-specific manifestations and design levers

Related MCP server: AI Development Guidelines MCP Server

Install

Option A — Run from local clone (today)

git clone https://github.com/raygroup/raygroup-defi-ux-mcp.git
cd raygroup-defi-ux-mcp
npm install
npm run build

The compiled entry point is at dist/index.js. Point your MCP client at it (instructions per client below).

Option B — Run via npx (once published to npm)

npx -y @raygroup/defi-ux-mcp

You can also configure your MCP client to do this automatically (see below).

Configure in Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "raygroup-defi-ux": {
      "command": "node",
      "args": ["/absolute/path/to/raygroup-defi-ux-mcp/dist/index.js"]
    }
  }
}

After publishing to npm, this becomes:

{
  "mcpServers": {
    "raygroup-defi-ux": {
      "command": "npx",
      "args": ["-y", "@raygroup/defi-ux-mcp"]
    }
  }
}

Restart Claude Desktop. The five tools appear under the MCP icon.

Configure in Cursor

In Cursor, go to Settings → MCP → Add new MCP Server and use:

{
  "mcpServers": {
    "raygroup-defi-ux": {
      "command": "node",
      "args": ["/absolute/path/to/raygroup-defi-ux-mcp/dist/index.js"]
    }
  }
}

Or, in ~/.cursor/mcp.json for global access across projects.

Configure in Codex CLI

Add to ~/.codex/config.toml:

[mcp_servers.raygroup-defi-ux]
command = "node"
args = ["/absolute/path/to/raygroup-defi-ux-mcp/dist/index.js"]

Try it

Once configured, ask your AI client things like:

• "Score this DeFi protocol against the Ray Group DeFi UX rubric."

• "What named patterns does Ray Group recommend for transaction confirmation UX?"

• "Look up the Ray Group glossary entry for anchoring and apply it to this slippage settings screen."

• "Search the Ray Group DeFi UX corpus for everything related to wallet onboarding."

The agent will call into the MCP server, retrieve the relevant entries, and ground its analysis in the Ray Group framework.

Inspect the server interactively

The MCP team ships an inspector that's great for debugging:

npm run inspect

This launches the MCP Inspector against this server, lets you call every tool by hand, and shows the raw JSON-RPC traffic.

What's coming in the premium tier

• Extended corpus — 50+ named patterns with named-protocol references; 30+ glossary entries

• audit_screenshot — submit a screenshot, receive a structured rubric-aligned audit

• audit_protocol — submit a protocol URL, receive a multi-page audit

• Case studies — anonymised Ray Group audit findings, indexed by protocol type

• API-key auth + hosted transport — so you can use it from cloud-hosted agents, not just locally

Premium tier ships with a paid MCP API key and an account on raygroup.uk/products/defi-ux-mcp. The free tier above stays free, forever.

License

MIT. See LICENSE.

Author

Built and maintained by Ray Group — an independent UK-based product practice grounded in human-computer interaction. Founder: Madalina Raicu — Senior Software Engineer; previously at BlackRock on Aladdin; international speaker on UX in Web3 and DeFi.

Issues, PRs, and content suggestions welcome at github.com/raygroup/raygroup-defi-ux-mcp.