Get Started
Using the Public Hosted MCP Server
Connect your Public.com brokerage account to Claude, ChatGPT, and Perplexity through the Public-hosted MCP server. Just point each assistant at the hosted endpoint, authenticate, and start interacting with your brokerage using natural language.
Before You Get Started
- →You will need a Public.com brokerage account. Create one at public.com/signup.
- →An MCP-compatible client. This guide covers Claude, ChatGPT, and Perplexity.
- →An API key. Generate one from the API settings page of your Public account.
- →The hosted MCP server URL:
https://mcp.public.com/mcp
Claude
3 steps- 1
Open Connectors
Go to Settings and select Connectors. Click the + button, choose Add custom connector, and name your connector. - 2
Add the server URL
Paste this URL into the Remote MCP server URL field:https://mcp.public.com/mcpthen click Add. - 3
Connect and authorize
Click Connect and complete the authorization flow in your browser.
Claude Code
7 steps- 1
Add the Public connector
In claude.ai or the Claude Desktop app, go to Settings → Connectors, find Public, and click Add. - 2
Sign in to Public
Sign in with your Public.com credentials when prompted. Confirm the connector shows as Connected. - 3
Start a Claude Code session
Open a terminal and runclaudeto start a session. Make sure you're signed into the same Claude account you used in step 1. - 4
Open the MCP server list
Type/mcpto see the list of available MCP servers. - 5
Select Public
Select Public. If it's not listed, the connector wasn't added in step 1 or you're signed into a different account in the terminal. - 6
Authenticate if needed
If Public shows as not authenticated, select Connect to launch the sign-in flow in your browser. - 7
Verify the connection
Ask Claude Code to list your Public accounts.
ChatGPT
3 stepsTrading permissions
To place trades from ChatGPT, you may need to adjust the connector's permissions. By default, ChatGPT can require additional approval before write actions such as placing orders are allowed.
- 1
Open Plugins
In ChatGPT, click Plugins, then click the + icon in the top right next to the Search plugins bar. - 2
Complete the MCP server form
NamePublic MCPConnectionhttps://mcp.public.com/mcpAuthenticationSelect OAuthRisk DisclosureCheck the server's risk boxClick Create.
- 3
Authenticate
Follow the prompts to authenticate.
Perplexity Computer
4 stepsPaid plan required
Adding a custom connector to your Perplexity account requires a paid Perplexity plan. Make sure your account is on a paid tier before continuing.
- 1
Open the connectors page
Navigate to perplexity.ai/computer/connectors. - 2
Add a custom connector
Click the + Custom connector button in the top right.
- 3
Fill out the connector form
In the Add custom connector form, fill out the fields as follows:NamePublic MCPMCP server URLhttps://mcp.public.com/mcpAuthenticationUnder Advanced, select API Key and paste your keyTransportStreamable HTTPAccept the terms and click Add.
- 4
Enable the connector
In the Available connectors section, you should now see the Public MCP connector listed. Click on it, then click Add connector.
Prompts to try
Once connected, start a new chat in any of these assistants and try prompts like:
- Show me my current account balance and buying power.
- How is my portfolio performing today?
- What is the current price of TSLA?
- Show me the options chain for AAPL expiring next Friday.
- Show me my recent transactions.
- What are my open orders?
- Cancel my open AAPL order.
- Find a good covered call opportunity on SPY based on my holdings.
- Place a buy order for 1 share of NVDA at market.
Important
Placing a trade through any MCP client is a real order using real money in your Public account. Review all preflight details carefully before confirming.