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Main Image Alert  ·  Included on Every Plan

Your main image changed.
The damage was already done.

Your primary product image drives clicks, conversion, and first impressions. Anyone in Amazon's catalog system can replace it — and Amazon sends no notification. SentryKit fires the instant your main image URL changes and captures both the old and new image, so you can act before clicks drop.

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30-day free trial
No credit card required
All ASINs monitored from day one
0
Amazon sends no notification when your main image changes
Real‑time
Alert fires the instant the primary image URL is replaced
Before + After
Both images captured at the moment of change
30 days
Free trial — full image monitoring from day one
Two States SentryKit Tracks

Image changed without you — or image restored. Both matter.

An unauthorized main image replacement can collapse click-through rate overnight. Shoppers judge your product by the first image they see — a blurry lifestyle photo or a competitor's image in your slot kills conversions before a single word is read.

Image Changed
Primary image replaced — non-compliant image now showing in search results
SentryKit detected that your main image URL has changed. The replacement image may have been submitted by a competing catalog contributor and does not meet Amazon's main image standards. Click-through rate is at immediate risk.
Main Image URL — changed
WAS images-na.ssl-images-amazon.com/images/I/71KxM…compliant-hero.jpg
NOW images-na.ssl-images-amazon.com/images/I/61bLf…lifestyle-blurry.jpg
Alert context
ASIN B09KLMX8TW · Non-Slip Bamboo Yoga Mat 6mm Change: Compliant white-background hero → lifestyle photo Contributor: Third-party catalog submission
Image Restored
Original approved main image is back — change logged with timestamp
SentryKit detected that the main image URL has reverted to your original compliant image following your re-upload via Manage Inventory. Click-through rate should recover as the updated image propagates across Amazon's CDN.
Main Image URL — restored
NOW images-na.ssl-images-amazon.com/images/I/71KxM…compliant-hero.jpg
Alert context
ASIN B09KLMX8TW · Non-Slip Bamboo Yoga Mat 6mm Restored via: Seller Central → Manage Inventory re-upload Full change log: timestamped and saved for Brand Registry
What the Alert Looks Like

The old image, the new image, the exact moment it changed

Not "your image was updated." SentryKit captures both images at the moment of change — so you already have the before and after before you even open Seller Central.

Stop finding out your main image changed from your click-through rate
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How to Respond

When the main image alert fires — act in this order

Speed matters. An unauthorized image in your main slot can drop click-through rate before you even notice a sales dip. SentryKit fires the moment it happens — here is what to do next.

1
Open the alert and review the before-and-after images — confirm it's unauthorized
SentryKit captures both images at the moment the URL changes. Open the alert and compare them. Confirm the new image is not one you submitted. Check whether the replacement meets Amazon's main image standards: pure white background, product filling 85%+ of frame, minimum 1000px on the longest side. If it doesn't, the unauthorized image may also trigger a listing quality issue.
2
Re-upload your compliant main image via Manage Inventory
Go to Seller Central → Manage Inventory → find the ASIN → Edit → Images tab. Re-upload your compliant main image (pure white background, 1000px+ on longest side, product fills 85%+ of frame). Submit the update and allow time for the image to propagate across Amazon's CDN.
3
If Brand Registry holder — report the unauthorized image via Brand Registry
Log into Brand Registry and use the Report a Violation tool to flag the unauthorized image. Provide the ASIN and documentation of your correct image — including original high-resolution files and proof of ownership. Brand Registry gives brand owners priority in catalog contribution disputes and can lock the main image against further unauthorized replacements.
4
If image keeps reverting — open a Seller Support case referencing the SentryKit timestamp
If your restored image is being overridden repeatedly, open a Seller Support case via Account Health. Reference the exact image change timestamp from SentryKit along with the before and after image record. This documentation speeds up the Seller Support investigation and gives you a stronger basis for escalation to the Listing Quality team.
Why SentryKit

The image replacement Amazon didn't tell you about — caught in real-time

Before and After Captured at Change Time
Both the previous image and the replacement are captured the moment the change occurs. You don't need to find the original — SentryKit already has it. The before and after record is stored and available for Brand Registry disputes immediately.
Real-Time Detection on Every Tracked ASIN
SentryKit monitors the primary image URL across your full catalog. The instant the URL changes, the alert fires — no daily check, no manual inspection. If your main image is replaced at 3am, you know by 3am.
Full Image Change Log for Brand Registry Disputes
Every image change is timestamped. If you need to file a Brand Registry case or Seller Support escalation, the log gives you the exact time, the old image, and the new image — the documentation that turns a dispute into a resolution.
SentryKit vs Manual

How sellers catch main image changes — with and without SentryKit

Capability SentryKit Manual checks
Discover image changed ✓ Real-time alert — fires the instant the URL changes ✗ Days or weeks, if ever noticed
Before image captured ✓ Yes — automatically at moment of change ✗ No — gone once overwritten, no record
Timestamp for disputes ✓ Yes — exact time logged for Brand Registry and Seller Support ✗ No record of when the change occurred
Monitoring across catalog ✓ All ASINs monitored simultaneously, 24/7 ✗ Manual spot-checking — one ASIN at a time
Amazon notification ✓ None sent by Amazon — SentryKit fills the gap ✗ None sent, and no backup detection
From Sellers Who Use It

What it feels like to catch a main image change before clicks drop

★★★★★
"A competitor contributed a lifestyle image that killed my CTR overnight. SentryKit flagged it within the hour. I had the original back up and a Brand Registry case open before my ad spend went to waste."
Private label seller — Home & Kitchen
★★★★★
"I never knew Amazon could change my main image without telling me. Found out the hard way. Now SentryKit monitors all 18 of my ASINs and I get the alert before I even notice the change in my click-through rate."
FBA seller — Sports & Outdoors
★★★★★
"The before-and-after capture is the feature. When the alert fires I already have both images — the original and the replacement. Filing the case takes minutes."
Brand owner — Beauty & Personal Care
All SentryKit alerts — 20+ signals, every layer of your listing
Buy Box Alert
Lost vs Suppressed — two alerts, two different recovery paths.
Hijacker Alert
Unauthorized seller on your ASIN with full seller profile.
Price Change Alert
Floor breach and competitor undercut — two separate signals.
Search Suppression Alert
Listing removed from Amazon search results entirely.
Suspended Listing Alert
Listing taken down — with policy notice and case ID details.
Add to Cart Alert
Add to Cart removed from your product page without Buy Box loss.
FBA Stock Alert
FBA inventory hit zero — Buy Box at immediate risk.
FBM Stock Alert
FBM stock levels dropping below your set threshold.
Sales Volume Alert
Unusual sales movement vs your rolling baseline — drops and spikes.
FBA Fee Change Alert
Amazon updated the FBA fulfilment fee on your ASIN.
Product Details Change Alert
Title, bullets, or description changed — with exact before and after.
Category Change Alert
ASIN moved to a different Amazon category — affects rankings and fees.
Parent Product Change Alert
ASIN reassigned to a different parent variation.
Best Seller Badge Alert
#1 Best Seller badge won or lost on your ASIN.
Amazon's Choice Alert
Amazon's Choice badge gained or removed from your listing.
Subscribe & Save Alert
Subscribe & Save eligibility changed on your ASIN.
Latest Reviews Alert
New reviews posted on your ASIN — 1-star to 5-star, all caught.
Top Rated Reviews Alert
High-impact reviews surfacing at the top of your listing.
Explore all SentryKit Alerts →

Know the instant your main image is replaced — before clicks drop.

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FAQ

Main Image Alert — common questions

SentryKit monitors the primary product image URL for every tracked ASIN. When the main image URL changes — meaning the image displayed to shoppers as the primary listing photo has been replaced — you receive an alert in real-time. The alert includes both the previous image and the replacement image, captured at the moment of change, along with a timestamp for use in Brand Registry disputes or Seller Support cases.
Any seller who has sold or currently sells the same ASIN can submit a catalog contribution that includes an alternative main image. Amazon's catalog system may accept the contributed image if it determines it better meets listing quality standards. Amazon's own catalog team may also modify images as part of listing quality enforcement. Even Brand Registry holders are not fully immune — a contributed image can override your original if the catalog system treats it as higher quality or more compliant with image requirements.
No. Amazon sends no notification when your primary product image is changed. There is no email, no Performance Notification, and no Seller Central alert for image changes — even when the replacement was submitted by a third party and does not meet Amazon's own image standards. SentryKit fills this gap by detecting the image URL change the instant it occurs and alerting you with both the old and new image captured.
Go to Seller Central → Manage Inventory → find the ASIN → Edit → Images tab. Re-upload your compliant main image (pure white background, 1000px+ on longest side, product filling 85%+ of frame). If you hold Brand Registry, simultaneously file a Report a Violation case with documentation of your correct image. If the image keeps reverting, open a Seller Support case via Account Health referencing the SentryKit timestamp and before/after record as documentation.
Persistent image reversion usually means a third-party catalog contributor continues to submit the replacement image, or Amazon's catalog system is treating the contributed image as higher quality than your original. The most effective path to a permanent resolution is a Brand Registry Report a Violation case with documentation of your approved image, followed by a Seller Support escalation to the Listing Quality team if the violation case does not resolve the issue. SentryKit's change log gives you the timestamps and image records needed for both escalations.
SentryKit monitors the primary image URL for every tracked ASIN continuously and fires the alert in real-time when the URL changes. You receive an email notification with both the previous image and the replacement image captured at the moment of change — so you can act immediately without needing to find the original yourself.