Polygon.io

Client configuration

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "polygonio": {
      "command": "npx",
      "args": [
        "-y",
        "polygon-mcp"
      ],
      "env": {
        "POLYGON_API_KEY": "your-polygon-api-key-here"
      }
    }
  }
}

VS Code (.vscode/mcp.json)

{
  "servers": {
    "polygonio": {
      "command": "npx",
      "args": [
        "-y",
        "polygon-mcp"
      ],
      "env": {
        "POLYGON_API_KEY": "your-polygon-api-key-here"
      },
      "type": "stdio"
    }
  }
}

Replace the placeholders before connecting. Authorize in your client when prompted.

The Cursor JSON also works in Claude Desktop's local MCP configuration. Install the required runtime and local software first.