Paper MCP Server (@paperinvest/mcp-server)

Official Model Context Protocol (MCP) server for Paper's trading platform. Lets AI coding assistants (Cursor, Claude, etc.) interact with the Paper Trading API to fetch quotes, place paper orders, and inspect portfolios.

Install

# Global install (recommended for CLI usage)
npm i -g @paperinvest/mcp-server

# Or run with npx
npx @paperinvest/mcp-server --help

Node.js 16+ recommended.

Configure

Set your Paper API credentials via environment variables (shell or .env).

export PAPER_API_KEY=your_api_key
# Optional override
export PAPER_API_BASE_URL=https://api.paperinvest.io

IDE Integrations

Cursor

File: ~/.cursor/mcp.json

{
  "mcpServers": {
    "paper": {
      "command": "paper-mcp-server",
      "env": {
        "PAPER_API_KEY": "your_api_key"
      }
    }
  }
}

Claude Desktop

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

Windows: %APPDATA%\\Claude\\claude_desktop_config.json

{
  "mcpServers": {
    "paper": {
      "command": "paper-mcp-server",
      "env": {
        "PAPER_API_KEY": "your_api_key"
      }
    }
  }
}

Tools Reference

• paper.quote(symbol) — Get real-time NBBO quote for a symbol
• paper.quotesBatch(symbols[]) — Get quotes for multiple symbols in one request
• paper.order({ ... }) — Place a simulated order (market/limit/stop, etc.)
• paper.portfolio(id) — Retrieve portfolio positions and P&L

See more tools and examples in the repository and on the MCP landing: https://paperinvest.io/mcp

Examples

Configs and demo scripts are in examples/:

• examples/.cursor/mcp.json — Cursor integration
• examples/claude/claude_desktop_config.json — Claude integration
• examples/scripts/get-quote.sh — Example prompt to fetch a quote
• examples/scripts/place-order.sh — Example prompt to place an order

Troubleshooting

• Ensure paper-mcp-server is in your PATH (npm prefix -g may help).
• Verify PAPER_API_KEY is set in the same environment as your client.
• Restart Cursor/Claude after changing config.
• Check connectivity to https://api.paperinvest.io.

Links

• NPM: https://www.npmjs.com/package/@paperinvest/mcp-server
• GitHub: https://github.com/paperinvest/mcp-server
• MCP Landing: https://paperinvest.io/mcp
• API Docs: https://docs.paperinvest.io

License

MIT © Paper Invest, Inc.