DXT — POC

A minimal clone of Liquid Co-Invest: an MCP server that turns Claude (or ChatGPT) into a trading co-pilot. It gives the model live market data and a paper-trading engine, all through public APIs that need no keys.

The model does the analysis and idea generation. This server only does two things: supply data and execute (paper) fills — exactly the split Liquid uses.

What's wired up

Layer	Source	Auth needed
Crypto perps	Hyperliquid info API	none
US stocks	Yahoo Finance chart API	none
Execution	Local paper engine (JSON file)	none
Interface	MCP server (stdio)	—

State persists to ~/.dxt/portfolio.json. Starts at $100,000 paper cash.

Tools the model can call

• get_crypto_quote(symbol) — mark price, 24h change, funding rate, open interest
• get_crypto_movers(limit) — top perps by 24h volume
• get_stock_quote(symbol) — price, day range, % change, volume
• place_trade(symbol, asset_type, side, qty, confirm) — two-step confirm flow
• get_portfolio() — cash, positions valued at live prices, unrealized PnL, equity
• get_trade_history(limit)
• reset_portfolio()

Setup

npm install
npm run build

Connect to Claude Desktop

Edit claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Linux: ~/.config/Claude/):

{
  "mcpServers": {
    "dxt": {
      "command": "node",
      "args": ["/ABSOLUTE/PATH/TO/DXT/dist/index.js"]
    }
  }
}

Restart Claude Desktop. Then try:

"What's BTC doing right now, and how does its funding compare to ETH?" "Buy me 0.25 BTC and 10 shares of NVDA in paper trading." "Show my portfolio."

Inspect locally (no Claude needed)

npm run inspect    # opens the MCP Inspector UI

How this maps to the real Liquid

Liquid routes real orders to DEXs (Hyperliquid for crypto perps, Ostium for stocks/commodities/FX, Lighter for more crypto) via a non-custodial wallet. This POC swaps that execution layer for a local paper engine. To go live you'd replace src/portfolio.ts with the Hyperliquid / Ostium SDKs and add wallet signing — the data layer and MCP interface stay the same.

Files

src/
  index.ts        MCP server + tool definitions
  datasources.ts  Hyperliquid + Yahoo Finance fetchers
  portfolio.ts    paper-trading engine (positions, PnL, persistence)