publicdotcom-mcp-server 0.2.0

MCP server for the Public.com Trading API

Public.com MCP Server

An MCP (Model Context Protocol) server that connects AI assistants to your Public.com brokerage account. Trade stocks, options, and crypto — get quotes, manage orders, and view your portfolio — all through natural language.

Disclaimer: For illustrative and informational purposes only. Not investment advice or recommendations. Use at your own risk.

Tools

Read-Only

Tool	Description
check_setup	Verify API credentials and connectivity
get_accounts	List all brokerage accounts
get_portfolio	View positions, equity, buying power, open orders
get_orders	List active/open orders
get_order	Get status of a specific order
get_history	Transaction history (trades, deposits, dividends, etc.)
get_quotes	Real-time quotes for stocks, crypto, options
get_instrument	Details about a specific tradeable instrument
get_all_instruments	List all available instruments with filters
get_option_expirations	Available expiration dates for options
get_option_chain	Full option chain (calls + puts) for a symbol
get_option_greeks	Greeks (delta, gamma, theta, vega, rho, IV) for multiple options
get_option_greek	Greeks for a single option symbol
preflight_order	Estimate costs/impact before placing a single-leg order
preflight_multileg_order	Estimate costs for multi-leg options strategies
preflight_short_order	Estimate costs before placing a short-sale order
preflight_call_credit_spread	Estimate costs for a Bear Call Spread
preflight_call_debit_spread	Estimate costs for a Bull Call Spread
preflight_put_credit_spread	Estimate costs for a Bull Put Spread
preflight_put_debit_spread	Estimate costs for a Bear Put Spread

Write (Destructive)

Tool	Description
place_order	Place a single-leg order (stocks, crypto, options)
place_multileg_order	Place multi-leg orders (spreads, straddles, etc.)
place_call_credit_spread	Place a Bear Call Spread
place_call_debit_spread	Place a Bull Call Spread
place_put_credit_spread	Place a Bull Put Spread
place_put_debit_spread	Place a Bear Put Spread
place_short_order	Place an equity short-sale order
flatten_and_go_short	Sell an existing long position then go short (experimental)
cancel_order	Cancel an existing order
cancel_and_replace_order	Atomically cancel and replace an order

Prerequisites

• Python 3.10+
• Public.com account — Sign up
• Public.com API key — Get one here

Installation

pip install publicdotcom-mcp-server

Or install from source:

git clone https://github.com/publicdotcom/publicdotcom-mcp-server.git
cd publicdotcom-mcp-server
pip install .

Configuration

Set your API credentials as environment variables:

# Required
export PUBLIC_COM_SECRET=your_api_secret_key

# Optional — sets a default account so you don't need to specify it each time
export PUBLIC_COM_ACCOUNT_ID=your_account_id

Usage

Claude Desktop

Add this to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "public-com": {
      "command": "publicdotcom-mcp-server",
      "env": {
        "PUBLIC_COM_SECRET": "your_api_secret_key",
        "PUBLIC_COM_ACCOUNT_ID": "your_account_id"
      }
    }
  }
}

Claude Desktop (using uvx)

If you prefer using uvx (no pre-install needed):

{
  "mcpServers": {
    "public-com": {
      "command": "uvx",
      "args": ["publicdotcom-mcp-server"],
      "env": {
        "PUBLIC_COM_SECRET": "your_api_secret_key",
        "PUBLIC_COM_ACCOUNT_ID": "your_account_id"
      }
    }
  }
}

Running Directly

# stdio transport (default — for Claude Desktop, Claude Code, etc.)
publicdotcom-mcp-server

# Or run as a Python module
python -m publicdotcom_mcp_server

Hosted / Remote Deployment

For remote deployments (behind a reverse proxy or load balancer), switch to the streamable-HTTP transport:

export MCP_TRANSPORT=streamable-http
export PUBLIC_COM_SECRET=your_api_secret_key
export PORT=8000  # optional, defaults to 8000
export HOST=0.0.0.0  # optional, defaults to 0.0.0.0
publicdotcom-mcp-server

In this mode the server listens for MCP requests at POST /mcp. Clients authenticate per-request via an Authorization: Bearer <key> header, which takes priority over the PUBLIC_COM_SECRET environment variable — useful for multi-tenant deployments.

Testing with MCP Inspector

npx @modelcontextprotocol/inspector publicdotcom-mcp-server

Development

# Clone and install in development mode
git clone https://github.com/publicdotcom/publicdotcom-mcp-server.git
cd publicdotcom-mcp-server
pip install -e ".[dev]"

# Run tests
pytest

# Run the server locally
python -m publicdotcom_mcp_server

How It Works

This server wraps the publicdotcom-py Python SDK, exposing each API operation as an MCP tool. The MCP protocol allows AI clients to discover and call these tools through a standardized interface.

AI Client (Claude, etc.)
    ↕ MCP Protocol (stdio)
Public.com MCP Server
    ↕ HTTPS
Public.com Trading API

All tools include proper MCP tool annotations:

• Read-only tools are marked with readOnlyHint: true
• Write tools are marked with destructiveHint: true

License

Apache 2.0