Paper MCP Server (@paperinvest/mcp-server)

npm version npm downloads license

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

Getting Started

Sign up at app.paperinvest.io
Generate an API key from your account settings
Add the configuration above with your API key
Restart Claude Desktop or Cursor

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.

Support

For support, visit paperinvest.io or email [email protected]

Paper