Who Watches the Watchlist — eBay Watchlist Monitor

Track price history for items on your eBay watchlist and get alerts when prices change. Local-only, no account or API key.

Detailed description Who Watches the Watchlist quietly records the price of every item on your eBay watchlist and tells you when one moves. Sign in to eBay in this browser, install the extension, and you're done — no eBay developer account, no API key, no separate login. A few times a day it reads your watchlist (using the eBay session you're already signed into) and records each item's current price. When an item you've set an alert on crosses your threshold, you get a desktop notification. Everything stays on your device. There is no server, no analytics, and no tracking. The only network requests it makes are read-only fetches of your own eBay watchlist. What it does • Builds a price history for every active item on your eBay watchlist • Per-item charts on the dashboard, with all-time low/high/average and a spike-aware "no change vs net change" indicator • Price-change notifications you configure per item — set a dollar threshold, a percent threshold, or both, and choose increase / decrease / either direction • A master notifications switch to silence everything (e.g. while away) • Auctions are tracked too (the current bid) • Search and sort your tracked items (recently added, price, name) • One-click CSV export of the full per-item summary How it works (the important bit) The extension only checks prices while Chrome is running. If Chrome is fully closed for a while you'll see a gap in the history — it resumes automatically next time you open Chrome. Checks are scheduled (default every 4 hours; configurable) and you can also press "Refresh now" any time. You must be signed in to eBay in the same browser. Privacy No backend, no telemetry, no accounts. All price history is stored locally in your browser. The only outbound requests are read-only fetches of your own eBay watchlist using your existing eBay session — never to the author or any third party. The extension never bids, buys, or changes your watchlist. See PRIVACY.md for the full policy. FAQ Q: Does it need an eBay developer account or API key? A: No. It reads the normal watchlist page using the eBay session you're already signed into. Q: Does it bid or buy anything? A: No. It is strictly read-only against your account. Q: Why is there a gap in the price history? A: The extension can only check while Chrome is running. It catches up on the next check after you reopen Chrome. Q: Can it track an item that isn't on my watchlist? A: No — add it to your eBay watchlist first. Q: Does it sync across devices? A: No. Data is local to one browser profile. Use the CSV export to take a snapshot elsewhere. Q: An item I was tracking disappeared. A: When an item leaves your eBay watchlist (sold, ended, or you removed it) it is dropped here too, after two consecutive checks confirm it's gone.