Octagon: MCP for Market Data

The Octagon MCP server provides specialized AI-powered financial research and analysis by integrating with the Octagon Market Intelligence API, enabling users to analyze and extract insights from public filings, earnings calls, financial metrics, private market transactions, and prediction market events within Claude Desktop and other popular MCP clients.

Tools

✅ octagon-agent orchestrates broad market intelligence analysis

• Public market insights (SEC filings, transcripts, financials, stock data)
• Private market insights (companies, funding rounds, deals, debt, investors)

✅ octagon-deep-research-agent for comprehensive deep research

• Multi-source synthesis for investment research questions
• Best for up-to-date, cross-source thematic analysis

✅ Prediction market research tooling

• octagon-prediction-markets-agent for Kalshi event research reports
• prediction_markets_history for structured historical market data retrieval

Get Your Octagon API Key

To use Octagon MCP, you need to:

1. Sign up for a free account at Octagon
2. After logging in, from left menu, navigate to API Keys
3. Generate a new API key
4. Use this API key in your configuration as the OCTAGON_API_KEY value

Prerequisites

Before installing or running Octagon MCP, you need to have npx (which comes with Node.js and npm) installed on your system.

Mac (macOS)

1. Install Homebrew (if you don't have it):

   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
   

2. Install Node.js (includes npm and npx):

   brew install node
   

   This will install the latest version of Node.js, npm, and npx.

3. Verify installation:

   node -v
   npm -v
   npx -v
   

Windows

1. Download the Node.js installer:
   • Go to https://nodejs.org/ and download the LTS version for Windows.
2. Run the installer and follow the prompts. This will install Node.js, npm, and npx.
3. Verify installation: Open Command Prompt and run:

   node -v
   npm -v
   npx -v
   

If you see version numbers for all three, you are ready to proceed with the installation steps below.

Installation

Running on Claude Desktop

To configure Octagon MCP for Claude Desktop:

1. Open Claude Desktop
2. Go to Settings > Developer > Edit Config
3. Add the following to your claude_desktop_config.json (Replace your-octagon-api-key with your Octagon API key):

{
  "mcpServers": {
    "octagon-mcp-server": {
      "command": "npx",
      "args": ["-y", "octagon-mcp@latest"],
      "env": {
        "OCTAGON_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

4. Restart Claude for the changes to take effect

Running on Cursor

Configuring Cursor Desktop 🖥️ Note: Requires Cursor version 0.45.6+

To configure Octagon MCP in Cursor:

1. Open Cursor Settings
2. Go to Features > MCP Servers
3. Click "+ Add New MCP Server"
4. Enter the following:
   • Name: "octagon-mcp" (or your preferred name)
   • Type: "command"
   • Command: env OCTAGON_API_KEY=your-octagon-api-key npx -y octagon-mcp

If you are using Windows and are running into issues, try cmd /c "set OCTAGON_API_KEY=your-octagon-api-key && npx -y octagon-mcp"

Replace your-octagon-api-key with your Octagon API key.

After adding, refresh the MCP server list to see the new tools. The Composer Agent will automatically use Octagon MCP when appropriate, but you can explicitly request it by describing your investmen

... View full README on GitHub