Site Spy
Track website changes and see exactly what updated
What it does
Site Spy monitors websites for changes automatically. Add any page from the browser extension (Chrome & Firefox) or web dashboard, and get notified the moment content updates. See exactly what changed with visual diffs — additions in green, removals in red. Track specific elements like prices or headlines with the built-in element inspector. Color-coded tags, snapshot timelines, and MCP server integration for AI assistants. Free plan included — no credit card needed
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all alternatives →- IBI built a tool that watches webpages and exposes changes as RSSMar 2026 · sitespy.app · ▲320
I built Site Spy after missing a visa appointment slot because a government page changed and I didn’t notice for two weeks. It watches webpages for changes and shows the result like a diff. The part I think HN might find interesting is that it can monitor a specific element on a page, not just the whole page, and it can expose changes as RSS feeds. So instead of tracking an entire noisy page, you can watch just a price, a stock status, a headline, or a specific content block. When it changes, you can inspect the diff, browse the snapshot history, or follow the updates in an RSS reader. It’s…
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