Who Watches the Watchlist — Watchlist Monitor for eBay

Tracking since May 20, 2026.

Changelog

• Jun 8, 2026
  short_description

  Track price history for items on your eBay watchlist and get alerts when prices change. Local-only. No data collection, no tracking.

  Track price history for eBay watchlist items with alerts when prices change. Price data stays on your device; usage counts only.

• Jun 8, 2026
  host_permissions

  https://*.ebay.com/*, https://*.ebay.co.uk/*, https://*.ebay.de/*, https://*.ebay.fr/*, https://*.ebay.it/*, https://*.ebay.es/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://*.ebay.at/*, https://*.ebay.be/*, https://*.ebay.ch/*, https://*.ebay.ie/*, https://*.ebay.nl/*, https://*.ebay.pl/*

  https://www.google-analytics.com/*, https://*.ebay.com/*, https://*.ebay.co.uk/*, https://*.ebay.de/*, https://*.ebay.fr/*, https://*.ebay.it/*, https://*.ebay.es/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://*.ebay.at/*, https://*.ebay.be/*, https://*.ebay.ch/*, https://*.ebay.ie/*, https://*.ebay.nl/*, https://*.ebay.pl/*

• Jun 2, 2026
  description

  Who Watches the Watchlist 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. There
  is nothing extra to sign up for. A few times a day it opens your watchlist in
  the background (using the eBay account you're already signed into) and writes
  down each item's current price. When an item you've set an alert on crosses
  your threshold, you get a desktop notification.
  
  No personal data leaves your computer. No tracking, no usage data, no separate
  accounts. The only thing the extension ever loads from the internet is your
  own eBay watchlist page.
  
  Earning a commission (on by default, one-click opt-out). When you click an item
  from inside the extension to view it on eBay, the click goes through eBay's
  affiliate program with our partner ID — so if you happen to buy that item
  within 24 hours, eBay pays us a small commission. The price you pay does not
  change. We receive only aggregate click and purchase counts from eBay, never
  your personal information. You can turn this off any time from the dashboard's
  settings.
  
  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
    clear summary of whether the price actually moved or just bounced and came
    back
  • 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 personal data leaves your computer. There are no separate accounts, no
  usage tracking, and no outside services involved beyond eBay itself. All price
  history is saved in your browser. The only thing the extension ever loads
  from the internet is your own eBay watchlist page, using the sign-in you
  already have. The extension never bids, buys, or changes your watchlist. By
  default, clicks on items in the dashboard go to eBay through eBay's affiliate
  program (see "Earning a commission" above); you can turn this off in
  settings. See PRIVACY.md for the full policy.
  
  FAQ
  
  Q: Do I need to sign up for anything extra?
  A: No. It just uses your normal eBay sign-in in this browser. No separate
  account, no special setup.
  
  Q: Does it bid or buy anything?
  A: No. It only reads prices. It never bids, buys, or changes anything on
  your account.
  
  Q: Does the developer make money from this extension?
  A: Maybe a little. By default, clicks on items inside the extension go to eBay
  through eBay's affiliate program. If you then buy the item within 24 hours,
  eBay pays us a small commission — your price doesn't change. The developer
  never receives your personal information. You can turn this off any time from
  the dashboard's settings.
  
  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. Your price history is saved in this one browser only. Use the CSV
  export if you want to copy it elsewhere.
  
  Q: An item I was tracking disappeared.
  A: When an item leaves your eBay watchlist (sold, ended, or you removed it) it
  drops off here too, after two checks in a row confirm it's gone.
  
  Q: What happens if I switch eBay accounts in the same browser?
  A: The extension notices on the next check and pauses reconciliation, so the
  items and price history from the original account aren't deleted. A banner in
  the extension explains the choice: sign back into the original account to
  resume tracking it, or click "Continue with <new account>" to commit the
  switch (the previous account's items will be removed on the next check). To
  track two accounts at once, install the extension in two separate Chrome
  profiles; each profile has its own isolated data.

  This project started because I'm an eBay super user and noticed that prices on my watchlist seemed to change over time without me being able to confirm.
  
  I was always asking questions:
  • Is this item at its best price or its highest price?
  • Did the seller increase the price and then immediately drop it to show a discount that isn't a real discount?
  • Is an item slowly decreasing over time and I should wait until it hits a target?
  
  With Who Watches the Watchlist now you can know for sure!
  
  I'm a solo developer who uses this extension every day for myself so it is always being refined. Feedback and bug reports are greatly appreciated and will be responded to.
  
  eBay is one of the great holdovers from the early internet but how do you know when an item on your watchlist hits the price you want? Who Watches the Watchlist records the price of every item on your eBay watchlist and tells you when one moves.
  
  How to use Who Watches the Watchlist
  
  Sign in to eBay in this browser, install the extension, and you're done. There is nothing extra to sign up for. A few times a day it checks your watchlist in the background using the eBay account you're already signed into and writes down each item's current price. You can change the schedule or press Refresh now any time from the dashboard. When an item you've set an alert on crosses your threshold, you get a desktop notification.
  
  No personal data leaves your computer. No tracking, no usage data, no separate accounts. The only thing the extension ever loads from the internet is your own eBay watchlist page.
  
  Earning a commission (on by default, one-click opt-out). When you click an item from inside the extension to view it on eBay, the click goes through eBay's affiliate program with our partner ID — so if you happen to buy that item within 24 hours, eBay pays us a small commission. The price you pay does not change. We receive only aggregate click and purchase counts from eBay, never your personal information. You can turn this off any time from the dashboard's settings.
  
  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 clear summary of whether the price actually moved or just bounced and came back
  • 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 personal data leaves your computer. There are no separate accounts, no usage tracking, and no outside services involved beyond eBay itself. All price history is saved in your browser. The only thing the extension ever loads from the internet is your own eBay watchlist page, using the sign-in you already have. The extension never bids, buys, or changes your watchlist. By default, clicks on items in the dashboard go to eBay through eBay's affiliate program (see "Earning a commission" above); you can turn this off in settings. See PRIVACY.md for the full policy.
  
  FAQ
  
  Q: Do I need to sign up for anything extra?
  A: No. It just uses your normal eBay sign-in in this browser. No separate account, no special setup.
  
  Q: Does it bid or buy anything?
  A: No. It only reads prices. It never bids, buys, or changes anything on your account.
  
  Q: Does the developer make money from this extension?
  A: Maybe a little. By default, clicks on items inside the extension go to eBay through eBay's affiliate program. If you then buy the item within 24 hours, eBay pays us a small commission — your price doesn't change. The developer never receives your personal information. You can turn this off any time from the dashboard's settings.
  
  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. Your price history is saved in this one browser only. Use the CSV export if you want to copy it elsewhere.
  
  Q: An item I was tracking disappeared.
  A: When an item leaves your eBay watchlist (sold, ended, or you removed it) it drops off here too, after two checks in a row confirm it's gone.
  
  Q: What happens if I switch eBay accounts in the same browser?
  A: The extension notices on the next check and pauses reconciliation, so the items and price history from the original account aren't deleted. A banner in the extension explains the choice: sign back into the original account to resume tracking it, or click "Continue with <new account>" to commit the switch (the previous account's items will be removed on the next check). To track two accounts at once, install the extension in two separate Chrome profiles; each profile has its own isolated data.

• May 26, 2026
  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.

  Who Watches the Watchlist 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. There
  is nothing extra to sign up for. A few times a day it opens your watchlist in
  the background (using the eBay account you're already signed into) and writes
  down each item's current price. When an item you've set an alert on crosses
  your threshold, you get a desktop notification.
  
  No personal data leaves your computer. No tracking, no usage data, no separate
  accounts. The only thing the extension ever loads from the internet is your
  own eBay watchlist page.
  
  Earning a commission (on by default, one-click opt-out). When you click an item
  from inside the extension to view it on eBay, the click goes through eBay's
  affiliate program with our partner ID — so if you happen to buy that item
  within 24 hours, eBay pays us a small commission. The price you pay does not
  change. We receive only aggregate click and purchase counts from eBay, never
  your personal information. You can turn this off any time from the dashboard's
  settings.
  
  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
    clear summary of whether the price actually moved or just bounced and came
    back
  • 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 personal data leaves your computer. There are no separate accounts, no
  usage tracking, and no outside services involved beyond eBay itself. All price
  history is saved in your browser. The only thing the extension ever loads
  from the internet is your own eBay watchlist page, using the sign-in you
  already have. The extension never bids, buys, or changes your watchlist. By
  default, clicks on items in the dashboard go to eBay through eBay's affiliate
  program (see "Earning a commission" above); you can turn this off in
  settings. See PRIVACY.md for the full policy.
  
  FAQ
  
  Q: Do I need to sign up for anything extra?
  A: No. It just uses your normal eBay sign-in in this browser. No separate
  account, no special setup.
  
  Q: Does it bid or buy anything?
  A: No. It only reads prices. It never bids, buys, or changes anything on
  your account.
  
  Q: Does the developer make money from this extension?
  A: Maybe a little. By default, clicks on items inside the extension go to eBay
  through eBay's affiliate program. If you then buy the item within 24 hours,
  eBay pays us a small commission — your price doesn't change. The developer
  never receives your personal information. You can turn this off any time from
  the dashboard's settings.
  
  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. Your price history is saved in this one browser only. Use the CSV
  export if you want to copy it elsewhere.
  
  Q: An item I was tracking disappeared.
  A: When an item leaves your eBay watchlist (sold, ended, or you removed it) it
  drops off here too, after two checks in a row confirm it's gone.
  
  Q: What happens if I switch eBay accounts in the same browser?
  A: The extension notices on the next check and pauses reconciliation, so the
  items and price history from the original account aren't deleted. A banner in
  the extension explains the choice: sign back into the original account to
  resume tracking it, or click "Continue with <new account>" to commit the
  switch (the previous account's items will be removed on the next check). To
  track two accounts at once, install the extension in two separate Chrome
  profiles; each profile has its own isolated data.

• May 26, 2026
  short_description

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

  Track price history for items on your eBay watchlist and get alerts when prices change. Local-only. No data collection, no tracking.

• May 26, 2026
  name

  Who Watches the Watchlist — eBay Watchlist Monitor

  Who Watches the Watchlist — Watchlist Monitor for eBay

• May 26, 2026
  host_permissions

  https://www.ebay.com/*, https://*.ebay.com/*

  https://*.ebay.com/*, https://*.ebay.co.uk/*, https://*.ebay.de/*, https://*.ebay.fr/*, https://*.ebay.it/*, https://*.ebay.es/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://*.ebay.at/*, https://*.ebay.be/*, https://*.ebay.ch/*, https://*.ebay.ie/*, https://*.ebay.nl/*, https://*.ebay.pl/*

• May 26, 2026
  permissions

  storage, alarms, notifications, offscreen

  storage, alarms, notifications, offscreen, cookies, webRequest

Permissions & access

Permissions

storagealarmsnotificationsoffscreencookieswebRequest

Host access

https://www.google-analytics.com/*, https://*.ebay.com/*, https://*.ebay.co.uk/*, https://*.ebay.de/*, https://*.ebay.fr/*, https://*.ebay.it/*, https://*.ebay.es/*, https://*.ebay.com.au/*, https://*.ebay.ca/*, https://*.ebay.at/*, https://*.ebay.be/*, https://*.ebay.ch/*, https://*.ebay.ie/*, https://*.ebay.nl/*, https://*.ebay.pl/*

Screenshots