The fastest way to connect your Public.com brokerage account to Claude Desktop is via our mcpb file. Install the Public MCP Bundle with a single click — no terminal commands and no editing config files by hand. Once installed, Claude becomes a trading agent that can research stocks, options, and crypto and place orders straight from a conversation.
Download the Public MCP Bundle
Install it into Claude Desktop with one click
Enter your credentials and place a trade
Download the Public MCP Bundle (.mcpb) using the button below. There's nothing to unzip or extract, as the single file is the whole bundle.
Double-click the .mcpb file you just downloaded. Claude Desktop opens automatically and shows an install dialog for the Public extension.
If double-clicking doesn't open Claude Desktop, you can install from inside the app instead: open Claude Desktop, go to Settings → Extensions, and drag the .mcpb file onto that window (or use the Install / Advanced settings → Install extension option and select the file).
In the install dialog, click Install. Claude Desktop then prompts you for the extension's configuration. Paste in the API key (secret) you copied earlier.
Click Save to finish. The extension shows as enabled in Settings → Extensions — no terminal, no JSON editing, and no manual restart required.
Security Notice
Your API key is stored locally on your machine. Treat it like a password — don't share it or expose it to others. It grants direct access to your brokerage account. Only install MCP bundles from sources you trust.
Start a new conversation in Claude Desktop and ask it to fetch your account balance:
Can you show me my current account balance and buying power?Claude will call the Public MCP server and return your live account data. You'll see it indicate when it's calling a tool before returning the result.
If Claude responds that it doesn't have access to brokerage tools, open Settings → Extensions and confirm the Public extension is installed and enabled, and that the API key was entered correctly.
Once connected, you can research and trade in natural language. Claude runs a preflight check — estimating total cost, buying power impact, and fees — before submitting anything live:
Can you place a buy order for 1 share of AAPL?Important
Placing a trade through Claude Desktop is a real order using real money in your Public account. Review all preflight details carefully before confirming. Only proceed if you fully understand and accept the risks involved.
More things you can ask
In about two minutes you've connected your Public.com brokerage to Claude Desktop using the one-click MCP Bundle. From here you can use Claude to research equities, pull options chains, analyze your portfolio against market data, and execute orders — all without leaving the conversation.
Prefer to configure the server manually, or want to run it alongside other MCP servers? See the manual Claude Desktop setup guide for the claude_desktop_config.json approach.
For the full list of available tools and advanced configuration options, refer to the Public MCP Server GitHub repository.