Needle X3
Get alerts when a monitored site adds specific phrases
Needle X3 launched on April 16, 2021 with 70 votes, #774 of 3,777 launches that month and more than 50% of that year's launches.
What it does
Monitor key phrases added or removed to specific sites: - Look for regulatory mentions on government sites. - Detect mentions of your brand, jobs, or specific tech terms on competitors. We’ll scan entire sites and send you simple change reports each day.
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I built a tool that watches webpages and exposes changes as RSSMar 2026 · sitespy.app · ▲320I 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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