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polygon-io/mcp_polygon)

MITAPI key required

) 🐍 ☁️ - An MCP server that provides access to financial market data APIs for stocks, indices, forex, options, and more.

PythonAPIs

Install

npx -y @modelcontextprotocol/inspector

Required environment variables

MASSIVE_API_KEYSet in your MCP config
POLYGON_API_KEYSet in your MCP config

claude_desktop_config.json

claude_desktop_config.json
{
  "mcpServers": {
    "polygon-io-mcp-polygon": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ],
      "env": {
        "MASSIVE_API_KEY": "<YOUR_MASSIVE_API_KEY>",
        "POLYGON_API_KEY": "<YOUR_POLYGON_API_KEY>"
      }
    }
  }
}

Add this to your Claude Desktop config file. Find it at ~/Library/Application Support/Claude/claude_desktop_config.json on macOS.