Ask AI who's buying, selling and holding US stocks

A free MCP server: no sign-up, no API key

Connect Claude, ChatGPT or another AI assistant to Livermore and ask in plain words. It looks up insider trades, 13F holdings and superinvestors, holders of more than 5%, Form 144 notices and Congress trades in first-hand public filings, and each result comes with a link to its page on Livermore so you can check the source.

MCP (Model Context Protocol) is the open standard that lets AI assistants use outside tools and data.

Server URL

https://livermore.club/mcp

Free · No sign-up · No API key · Read-only

Paste this address into your AI app. It is made for AI apps, so opening it in a browser won't show a page.

What you can ask

Ask in your own words. The assistant decides what to look up and can tell you which pages the answer came from.

“Which CEOs have been buying their own company's stock lately?”
Insider trades (Form 4)
“What did Warren Buffett buy in the latest quarter?”
13F holdings
“Which stocks has Pelosi traded this year?”
Congress trades
“Who owns more than 5% of NVDA?”
13D and 13G
“Which companies have had three or more insiders buying in the past month?”
Insider trades (Form 4)
“Which institutions added the most Apple shares in the latest quarter?”
13F holdings
“Which insiders gave notice this week that they plan to sell shares?”
Form 144
“Which superinvestors own TSMC (TSM)?”
13F holdings

Answers come from the filings only: Livermore has no market prices and gives no investment advice. Congress trades cover stocks, ETFs and options unless you ask about bonds or other assets.

Connect in three steps

Pick the app you use. Livermore needs no account or key, so leave any sign-in or OAuth fields empty.

Claude

claude.ai and the Claude desktop app, on every plan. The Free plan allows one custom connector. On a Team or Enterprise plan, an Owner first adds it under Organization settings → Connectors.

Go to Customize → Connectors and click Add custom connector (it may be under +).
Paste https://livermore.club/mcp as the server URL and name it Livermore if asked. Leave the OAuth fields empty (or choose No sign-in), then click Add.
In a chat, click +, open Connectors and turn on Livermore. Then ask a question.

Official instructions from Anthropic (opens in a new tab)

ChatGPT

chatgpt.com on the web, in Developer mode. It is available on the Plus, Pro, Business, Enterprise and Edu plans, not on Free, and in a Business, Enterprise or Edu workspace an admin may need to allow it.

Go to Settings → Security and login and turn on Developer mode.
Open Plugins (chatgpt.com/plugins), click + and create an MCP app. Name it Livermore, paste https://livermore.club/mcp as the URL and choose No Authentication.
Start a new chat, choose Developer mode from the + menu and select Livermore. Then ask a question.

Official instructions from OpenAI (opens in a new tab)

Cursor

The Cursor code editor. It reads MCP servers from a settings file called mcp.json.

Open ~/.cursor/mcp.json in your home folder, or create it. A .cursor/mcp.json file inside a project works for that project only.
2
Add Livermore and save the file. If other servers are already listed, put the livermore entry inside mcpServers with them:
```
{
  "mcpServers": {
    "livermore": {
      "url": "https://livermore.club/mcp"
    }
  }
}
```
Open Customize in the sidebar and check that Livermore is switched on, then ask in the chat. Cursor asks before it uses a tool.

Official instructions from Cursor (opens in a new tab)

Other apps

Claude Code, VS Code and any other app that can add a remote MCP server.

Find where your app adds MCP servers. It may be called connectors, integrations or tools.
Add a remote server of type Streamable HTTP (sometimes just called HTTP) with the URL https://livermore.club/mcp and no authentication.
Turn it on and ask a question.

Examples

Claude Code: run this in a terminal:

claude mcp add --transport http livermore https://livermore.club/mcp

VS Code: add this to .vscode/mcp.json, or run MCP: Add Server from the Command Palette:

{
  "servers": {
    "livermore": {
      "type": "http",
      "url": "https://livermore.club/mcp"
    }
  }
}

Apps that only run local (stdio) servers: connect through the mcp-remote bridge, which needs Node.js:

{
  "mcpServers": {
    "livermore": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://livermore.club/mcp"
      ]
    }
  }
}

What data it covers

The same first-hand public filings as the website, updated every day.

Insider trades (Form 4)Since July 2021: Buys, sells, stock awards and option exercises reported by company officers, directors and holders of more than 10%.
13F holdingsSince Q1 2021: What investment managers with $100 million or more in US-listed stocks hold at the end of each quarter, including a curated list of superinvestors such as Warren Buffett.
13D and 13GSince 2021: Filings by holders of more than 5% of a company. The size of each stake comes from the newer filing format, required since December 2024; older filings list only the holder, the company and the date.
Form 144Since 2023: Notices that an insider plans to sell restricted or control shares. A notice is a plan, not a completed sale.
Congress tradesSince 2020: Trades that members of the House and the Senate report, with the amount ranges they file. Stocks, ETFs and options by default; bonds and other assets when you ask for them.

The server is read-only: it looks things up but can't change anything or place trades. Each lookup returns up to 200 rows, and each IP address can make up to 60 requests a minute.

Where the data comes from, when it is updated and what it can't tell you: About the data.

Full tool reference

For developers, and anyone who wants the details.

The developer page lists every tool with its parameters and examples, the result format, limits and error codes, and setup for more apps.

Open the full tool reference