Competitor Website Change Monitor

Monitor competitor websites for price drops, new products, promotions, and content changes — directly from Claude, Cursor, or any MCP-compatible AI client.

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What It Detects

Change	Example
💰 Price change	$120 → $99
🆕 New product	"New Balance 990v5" appeared
🗑️ Removed product	"Old SKU" no longer listed
🎯 Promotion	"20% OFF" → "30% OFF sitewide"
📄 Page title	"BestShop Shoes" → "BestShop SALE"

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Quickstart (Local / Claude Desktop)

# 1. Clone
git clone https://github.com/Oko300/competitor-monitor-mcp
cd competitor-monitor-mcp

# 2. Install
pip install -r requirements.txt

# 3. Test
pytest tests/ -v

# 4. Add to Claude Desktop
#    Edit: ~/Library/Application Support/Claude/claude_desktop_config.json  (Mac)
#    Edit: %APPDATA%\Claude\claude_desktop_config.json                       (Windows)

Claude Desktop config:

{
  "mcpServers": {
    "competitor-monitor": {
      "command": "python3",
      "args": ["C:/path/to/server.py"],
      "env": {
        "MONITOR_CACHE_FILE": "C:/path/to/monitor_cache.json"
      }
    }
  }
}

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MCP Tools Available

Tool	What it does
monitor_website	Check one URL for changes
monitor_multiple_websites	Check a batch of URLs at once
list_monitored_websites	See all tracked URLs
get_website_snapshot	View last cached data (no re-fetch)
remove_website	Stop tracking a URL

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Example Output

{
  "url": "https://competitor.com/shoes",
  "changed": true,
  "changes": [
    {
      "type": "price_change",
      "removed": ["$120.00"],
      "added": ["$99.00"],
      "timestamp": "2026-06-19T10:00:00"
    },
    {
      "type": "new_products",
      "items": ["New Balance 990v5"],
      "timestamp": "2026-06-19T10:00:00"
    }
  ]
}

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Project Structure

competitor-monitor-mcp/
├── server.py                  ← MCP server (main product)
├── requirements.txt
├── pyproject.toml
├── .gitignore
├── README.md
├── tests/
│   └── test_server.py         ← 13 pytest tests
└── .vscode/
    ├── launch.json            ← Run/debug configs
    └── extensions.json        ← Recommended extensions

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Pricing Tiers (MCPize)

Plan	Sites	Frequency	Price
Starter	5	Daily	$9.99/mo
Pro	25	Hourly	$29.99/mo
Business	100	Real-time	$79.99/mo

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Notes

• Works on standard HTML sites (Shopify, WooCommerce, static pages)
• JavaScript-heavy SPAs may need a headless browser (Playwright) upgrade
• Cache persists across restarts via monitor_cache.json
• 100% free: no third-party APIs, no paid data sources