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Site Spy is a website monitoring tool that tracks pages for changes automatically. Use the web dashboard on any device, or install the browser extension for Chrome and Firefox. It checks pages on a schedule you set, detects updates, and notifies you instantly.

What can you do with Site Spy?

  • Track any website — Add pages to your watchlist and get notified when they change
  • Point at what you want watched — The picker shows the page and you click the price, the stock line, the heading — or drag a box around an area. Only changes inside it reach you
  • Pick it anywhere — the same choice is made from the dashboard, inside the AI Chat, or on the live page from the browser extension
  • Price & restock alerts — A dedicated mode that reads a product’s price and stock status instead of diffing page text
  • Visual diffs — See exactly what changed with green (added) and red (removed) highlights
  • Screenshot capture — Capture full-page screenshots and compare them visually with before/after sliders and diff overlays (Pro)
  • Snapshot timeline — Browse every captured version and compare any two snapshots
  • Get notified — Browser alerts, email, Telegram, or 90+ webhook integrations (Discord, Slack, Teams, and more)
  • Told when a watch breaks — Health alerts email you when a page starts blocking us or a filter stops matching, on every plan including Free
  • AI Chat — Manage watches through conversation — create monitors, check changes, adjust ignore rules and check intervals. It opens the picker rather than deciding what a watch follows
  • Noise reduction — deterministic filters that strip timestamps, counters, ads and cookie banners, plus backtested ignore rules for a watch that keeps alerting about nothing
  • AI change summaries — Plain-language change summaries, included on Pro and Agency; optionally use your own Claude, GPT or Gemini key
  • MCP integration — Connect AI assistants like Claude and Cursor to monitor websites through Site Spy
  • CSS & XPath filters — Write the selector by hand when you would rather not point, and ignore noisy text by regex
  • Browser steps — Monitor login-protected pages with automated interactions, on every plan
  • Share watches — Send a share link so others can add your watch configuration in one click
  • Community watches — Browse public monitoring setups to find pages worth following, or publish your own
  • Team collaboration — Invite team members to share watches and dashboards (Agency)
  • RSS feeds — Subscribe to change feeds in any RSS reader
  • Import & Export — Bulk import URLs and export your watches as JSON or plain text
  • Customize your view — Toggle action buttons, choose dark/light/auto theme
  • Sync across devices — Sign in once, access all watches from any browser

Get started

Open the dashboard

Install the extension

Start watching pages