Stock Moves Explained

io.github.Pink707LegendaryPublished by GitHub account Pink707Legendaryv1.2.0Updated Oct 27, 2026

Explains why stocks moved. 'Why did Tesla drop?' 'What happened to NVDA?' S&P 500/NASDAQ/Dow.

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingFinance

Overview

AI-generated overview

Remote MCP server that explains why major US stocks moved today, returning AI-written summaries with news catalysts and a confidence score.

What you can do
  • Explain a stock's recent move: pass a ticker or company name and get a summary of what drove it, citing news catalysts, earnings and analyst actions.
  • Assess the explanation: each result includes a confidence score and a flag for moves with no clear catalyst.
  • Link out to a fuller analysis page for the queried stock.
  • Coverage spans roughly 550 stocks in the S&P 500, NASDAQ 100 and Dow 30, focused on moves beyond about two standard deviations.
When to use it
Useful when a user asks why a well-known US stock or index moved recently, for example why a ticker dropped today or what news moved it. Not intended for price quotes, predictions, trading advice, crypto, moves older than about a week, or monitoring and alerts.
Requirements
A remote MCP endpoint; no installation, account, API key or environment variable is declared. The client connects to the hosted server URL over streamable HTTP. Rate limit is 10 requests per minute per IP.
Before you install
Explanations are AI-generated and may be incomplete or wrong despite the confidence score; treat them as commentary, not verified fact. The server does not give trading advice or predictions. Queries and your IP address go to a third-party service, and results link to its website.

Installation

In SourceWeft

  1. Open Stock Moves Explained in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Pink707Legendary%2Fstock-moves-explained/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

README

Stock Moves Explained - MCP Server

AI-powered analysis explaining why US stocks moved. Built by WTF Just Happened.

What It Does

When you ask your AI assistant "why did Tesla drop today?", this tool provides real market analysis - not hallucinated explanations. We monitor ~550 major US stocks (S&P 500, NASDAQ 100, Dow 30) and analyze moves that exceed 2 standard deviations from normal trading.

Try It

Ask 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?"

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

What You Get

For each stock query, you'll receive:

  • Summary: Concise explanation of what drove the move
  • Confidence score: How certain the analysis is (based on source quality)
  • Mystery move flag: Whether the move has no clear catalyst
  • Link to full analysis: 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)

Example Response

json
{  "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 - no installation required. Add to your MCP client config:

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

Rate Limits

10 requests per minute per IP. This is generous for normal usage - if you're building something that needs more, reach out.

Links

About

Built by WTF Just Happened - market intelligence for retail investors. We use AI to explain significant stock movements so you understand what's happening in your portfolio.

Source: README.md at commit e74a3ed

Tools

1

stock-moves-explained

Stock Moves Explained

Explains why a stock had a significant price move today. Provides AI-written analysis citing news catalysts, earnings reports, and analyst actions. Covers every S&P 500, NASDAQ 100, and Dow stock, plus any stock a user adds to their portfolio. Pass any stock ticker or company name as the ticker parameter. NOT for: price quotes, trading advice, predictions, crypto, or forex. If you cannot make POST requests, visit https://justhappened.wtf/api-help for alternative access methods.

Parametersdatetickerrequiredmove_type

Version history

1
  1. v1.2.0LatestSep 16, 2026

Score

90% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.