Alpaca MCP Server

Expose Alpaca Market Data & Broker API as MCP tools.

Installation

npm install alpaca-mcp

Local Development

git clone <repo-url>
cd alpaca-mcp
npm install

Environment Variables

Create a .env at project root with:

ALPACA_ENDPOINT=https://data.alpaca.markets
ALPACA_BROKER_ENDPOINT=https://broker-api.alpaca.markets
ALPACA_API_KEY=YOUR_ALPACA_API_KEY
ALPACA_SECRET_KEY=YOUR_ALPACA_SECRET_KEY

Commands

start (dev): npm start (runs npx tsx index.ts)
build: npm run build (compiles to dist/)
run compiled: node dist/index.js

Usage

Once running, the MCP server listens on stdin/stdout. Use any MCP client or the CLI:

npm link      # optional
alpaca-mcp    # starts server globally

Available Tools

get-assets { assetClass?: "us_equity" | "crypto" }
get-stock-bars { symbols: string[]; start: string; end: string; timeframe: string }
get-market-days { start: string; end: string }
get-news { start: string; end: string; symbols: string[] }

Each returns JSON in content[0].text or an error.

MCP Client Configuration

To integrate via mcp.config.json, add the following under the mcpServers key:

{
  "mcpServers": {
    "alpaca-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "alpaca-mcp"
      ],
      "env": {
        "ALPACA_ENDPOINT": "https://data.alpaca.markets",
        "ALPACA_BROKER_ENDPOINT": "https://broker-api.alpaca.markets",
        "ALPACA_API_KEY": "<YOUR_API_KEY>",
        "ALPACA_SECRET_KEY": "<YOUR_SECRET_KEY>"
      }
    }
  }
}

## Publishing

```bash
npm publish

License

ISC