Site Spy
Website change monitoring,
powered by AI
Track any webpage and describe what matters — "price drops", "new listings", "when tickets go on sale". AI auto-filters the noise so you only get meaningful alerts.
Chrome
Firefox
Watch List
SettingsSee website changes at a glance
Visual diff highlighting shows exactly what content was added, changed, or removed
Your monitoring dashboard
Manage all your tracked websites from a powerful web dashboard — works on any device
AI-powered website monitoring
Tell our AI what you care about — it handles the rest
AI smart filters
Describe what you care about — "price changes", "new job listings", "when reservations open" — and AI auto-configures filters so you only get meaningful notifications
AI chat assistant
Set up monitors, configure filters, check what changed — all through natural conversation. No menus or settings to learn.
One-click website tracking
Add any page to your watchlist instantly from your browser toolbar or right-click menu
Element inspector
Pick specific elements on a page to track instead of monitoring the entire site — perfect for prices, stock status, or headlines
Visual diff view
Compare live content with previous snapshots — additions in green, removals in red, just like a code diff
Snapshot timeline
Browse every captured version with timestamps and compare any two snapshots side by side
Color-coded tags
Organize tracked websites with Finder-style color labels, filter and search instantly
Change notifications
Browser push, badge counts, email reports, and Telegram messages the moment a tracked page changes
Flexible check intervals
Set monitoring frequency from every few minutes to weekly — you control when Site Spy checks for updates
RSS change feeds
Subscribe to website change feeds in any RSS reader — get updates in Feedly, Inoreader, or your favorite aggregator
Screenshot capture
Capture full-page screenshots alongside text snapshots and compare visual changes with a before/after slider
Cross-device sync
Sign in once and access all your tracked websites from any browser or device
Works with your AI assistant
Connect Site Spy to Claude, Cursor, or any MCP-compatible AI agent
What can AI agents do?
- Monitor websites and track changes automatically
- Get notified in natural language when content updates
- Compare snapshots and summarize what changed
- Manage all watches without leaving your AI chat
{
"mcpServers": {
"site-spy": {
"command": "npx",
"args": ["-y", "@site-spy/mcp-server"],
"env": {
"SITE_SPY_API_KEY": "your-key"
}
}
}
}How Site Spy works
Start monitoring website changes in under 30 seconds
Create a free account
Sign up at sitespy.app — no credit card needed
Add a website and tell us what matters
Paste any URL and describe what you care about — AI analyzes the page and auto-applies smart filters
Get notified
Site Spy checks for changes and alerts you when something updates
Simple, transparent pricing
Start free. Scale when you're ready. No surprises.
Track 5 websites and see what changes — free forever
- ✓5 watched URLs
- ✓1 hour minimum recheck
- ✓5 snapshots per watch
- ✓30 days snapshot history
- ✓3 manual rechecks/day
- ✓API: 100 requests/day (read-only)
- ✓MCP: read-only access
- ✓Visual diff history
- ✓RSS change feeds
- ✓Browser extension
- ✓Web dashboard
Get emailed when your tracked websites change
- ✓25 watched URLs
- ✓10 min minimum recheck
- ✓25 snapshots per watch
- ✓90 days snapshot history
- ✓10 manual rechecks/day
- ✓API: 1,000 requests/day
- ✓MCP: full access
- ✓Email notifications
- ✓90+ webhook integrations
- ✓Visual diff history
- ✓RSS change feeds
- ✓Import / Export
API access, AI summaries, and smart alerts for developers
- ✓100 watched URLs
- ✓1 min minimum recheck
- ✓100 snapshots per watch
- ✓1 year snapshot history
- ✓25 manual rechecks/day
- ✓API: 10,000 requests/day
- ✓MCP: full access + bulk ops
- ✓AI change summaries (coming soon)
- ✓Screenshot capture
- ✓Browser steps (login flows)
- ✓Structured JSON responses
- ✓Priority checking queue
- ✓Email, Slack, Discord, Telegram
- ✓90+ webhook integrations
- ✓Priority support
Shared monitoring for teams with compliance and export
- ✓500 watched URLs
- ✓1 min minimum recheck
- ✓500 snapshots per watch
- ✓1 year snapshot history
- ✓5 team seats included (+€15/seat)
- ✓Shared watches & dashboards
- ✓Custom notification templates
- ✓Data export (CSV / JSON)
- ✓100 manual rechecks/day
- ✓API: 50,000 requests/day
- ✓MCP: full access + bulk ops
- ✓Screenshot capture
- ✓Email, Slack, Discord, Telegram
- ✓90+ webhook integrations
- ✓Dedicated support & SLA
Payments processed by Lemon Squeezy. Cancel anytime. All prices in EUR.
Frequently asked questions
Everything you need to know about Site Spy
What is Site Spy?
Site Spy is a website monitoring tool that tracks pages for changes automatically. It checks on a schedule you set, detects content updates, and notifies you instantly. Use the web dashboard on any device, or add the browser extension for one-click tracking in Chrome and Firefox.
How does website change detection work?
Site Spy takes snapshots of the pages you track at your chosen interval (from minutes to weeks). When new content is detected, it highlights exactly what changed using a visual diff view — additions appear in green and removals in red. You can browse the full snapshot timeline to compare any two versions.
Is Site Spy free to use?
Yes, Site Spy has a free plan that lets you track up to 5 websites with checks every hour. Browser push notifications are available on all plans. For more watches, faster check intervals (down to 1 minute), email notifications, and Telegram alerts, you can upgrade to Starter (€4/mo) or Pro (€8/mo).
How can I access Site Spy?
The web dashboard works in any browser, including mobile. For desktop, you can also install the browser extension for Chrome or Firefox. Your watches sync across all devices when you sign in.
Can I track specific parts of a page instead of the whole page?
Yes. Site Spy includes an element inspector that lets you click on any element on a webpage to monitor just that section. This is useful for tracking price changes, stock availability, news headlines, or any specific content block.
What are AI smart filters?
When you add a website, describe what you care about in plain English — like 'price changes', 'new job listings', or 'when reservations open'. Site Spy's AI analyzes the page and automatically configures filters to ignore noise like timestamps, cookie banners, visitor counters, and dynamic ads. You only get notified when something meaningful changes. No CSS selectors or manual setup required.
How is Site Spy different from Visualping or Distill?
Most website monitoring tools make you manually pick CSS selectors or draw boxes around page areas. Site Spy uses AI to understand what you care about in plain English and auto-configures filters for you. It also includes a built-in AI chat assistant, visual diffs, MCP integration for AI agents, and a browser extension for Chrome and Firefox — all with a free plan.
Does Site Spy work with AI assistants?
Yes. Site Spy provides an MCP (Model Context Protocol) server that integrates with Claude, Cursor, and other MCP-compatible AI agents. Your AI assistant can monitor websites, compare snapshots, and summarize changes directly in your chat. Site Spy also has a built-in AI chat where you can set up monitors, configure filters, and check what changed through natural conversation.
Stop drowning in false alerts
Tell AI what matters, ignore the noise. Start monitoring in 30 seconds.