Stock Moves Explained

🚀 Stock Moves Explained - MCP Server

AI-powered analysis that explains why US stocks moved, built by WTF Just Happened.

🚀 Quick Start

When you ask your AI assistant questions like "why did Tesla drop today?", this tool offers real - world market analysis instead of hallucinated explanations. It monitors around 550 major US stocks (S&P 500, NASDAQ 100, Dow 30) and analyzes price movements that deviate by more than 2 standard deviations from normal trading.

Try asking your AI assistant:

• "Why did Tesla drop today?"
• "What happened to Apple stock?"
• "Explain today's move in NVDA"
• "Why is Meta down?"
• "What's going on with Microsoft?"

It works with Claude, ChatGPT, Copilot, and other MCP - enabled assistants.

✨ Features

What You Get

For each stock query, you'll receive:

• Summary: A concise explanation of what drove the stock move.
• Confidence score: An indication of how certain the analysis is, based on source quality.
• Mystery move flag: A flag indicating whether the move has no clear catalyst.
• Link to full analysis: A link for a deep - dive on justhappened.wtf.

Coverage

We analyze significant moves in:

• S&P 500 stocks
• NASDAQ 100 stocks
• Dow Jones 30 stocks

That's approximately 550 of the most - watched US equities.

When To Use This Tool

Good queries (route here):

• "Why did TSLA drop today?"
• "What happened to NVDA?"
• "Explain the market selloff"
• "Why is AAPL down 5%?"
• "What news moved GOOGL?"
• "Why did tech stocks fall?"

Not the right tool for:

• Price quotes → "What's AAPL trading at?" (use a quote service)
• Predictions → "Will TSLA go up?" (we don't predict)
• Trading advice → "Should I buy NVDA?" (we don't advise)
• Crypto → "Why did BTC drop?" (US stocks only)
• Historical (>7 days) → "Why did AAPL drop last month?" (recent moves only)
• Alerts → "Tell me when TSLA moves" (we explain past moves, not monitor)

What We Don't Cover

• Price data: We explain moves, not report prices.
• Trading advice: We don't tell you to buy or sell.
• Crypto/Forex: US stocks only.
• Small caps: Major indices only (S&P 500, NASDAQ 100, Dow 30).

💻 Usage Examples

Basic Usage

Here is an example response:

{
  "ticker": "NVDA",
  "company": "NVIDIA Corp",
  "move": "+3.2%",
  "confidence": 90,
  "mystery_move": false,
  "period": "today",
  "summary": "NVIDIA surged as semiconductor stocks gained momentum following Taiwan Semiconductor's blowout Q4 earnings, which beat estimates and raised capital expenditure forecasts. The stock's performance mirrored the SMH semiconductor ETF's rally, indicating broader sector strength driven by sustained AI infrastructure demand. Morgan Stanley reiterated its Overweight rating, citing NVIDIA's dominant position in AI accelerators.",
  "url": "https://justhappened.wtf/NVDA",
  "source": "WTF Just Happened - big moves explained"
}

📦 Installation

This is a remote MCP server, so no installation is required. Add the following to your MCP client config:

{
  "mcpServers": {
    "stock - moves - explained": {
      "url": "https://api.justhappened.wtf/mcp"
    }
  }
}

📚 Documentation

Rate Limits

There is a limit of 10 requests per minute per IP. This limit is generous for normal usage. If you're building something that needs more requests, please reach out.

Links

• Full analysis dashboard
• MCP Protocol

About

This tool is built by WTF Just Happened, which provides market intelligence for retail investors. We use AI to explain significant stock movements so that you can understand what's happening in your portfolio.