SellerFeeInspector

Fee monitoring for Amazon sellers

Monitor Amazon fees, charges, and product data. React quickly to changes or anomalies.

Protect your margins by acting before a change or discrepancy adds up across dozens or hundreds of orders.

SellerFeeInspector monitors FBA fees and the factors that can affect them every day, alerts you when something changes, and checks actual charges to identify possible discrepancies.

Apply for the free Beta No payment card required
  • Read-only
  • Connect in about 5 minutes

Independent service. Not affiliated with Amazon.

Illustrative example

Without monitoring

  1. Amazon updates the dimensionsWeight, category, attributes, or other relevant conditions could change too.
  2. The FBA fee increasesBefore: €4.60 · After: €5.30+€0.70 per order
  3. No alertOrders continue and the extra costs add up.
After 50 orders+35 €After 200 orders+140 €After 450 orders+315 €

You notice it after the impact has already grown.

With SellerFeeInspector

  1. Amazon updates the dimensionsThe same initial change is observed by the system.
  2. The FBA fee increasesBefore: €4.60 · After: €5.30+€0.70 per order
  3. Change detected and immediate alertYou can review the case and promptly ask Amazon to check it.
Example: 8 orders affectedLimited impact: +€5.60

Act sooner and limit the impact.

Read-only accessWe cannot modify your Amazon account
No buyers' personal dataWe do not download customers' personal data
No changes to your accountProducts, prices, and offers remain under your control
No payment card during the BetaNo subscription or automatic charge

Real case

Did you sell with FBA between July 22 and 30?

Check whether the same possible anomaly appears on your account.
0,26 €approximately per unit
~500orders involved in the real case
120 €refunded by Amazon in the verified case
Check the anomaly for free Real case. No refund is guaranteed.

The problem

The problem is not knowing your fees. It is noticing when something changes.

Dimensions, weight, and other conditions can change over time. With many SKUs and orders, it is easy to find out late, after the impact has already added up and it is harder to understand what happened.

01Change goes unnoticed
02Orders continue
03Costs add up
04Late discovery

The key difference

Two checks, in one system

Knowing that something changed is not enough. You also need to check what you were actually charged.

1

Monitor fees and what changes

Every day, we compare FBA fees and the available factors that may affect them, retain the history, and alert you when we detect a change.

FBA fee4,60 €5,30 €+0,70 €
  • Daily comparison
  • Change history
  • Email and dashboard alerts
2

Check actual charges

When charges become available, we compare the expected amount with what was actually paid and show the affected orders, the difference, and a possible cause.

ExpectedActualDifferenceOrdersPossible cause
3,40 €3,95 €+0,55 €128Overestimated dimensions
  1. Daily observation
  2. Change detected
  3. Alert
  4. Actual charges
  5. Check
  6. Discrepancy or OK

The product, not a promise

See what SellerFeeInspector detects

Visual examples of the information available in the dashboard, from change history to charge details.

Demo data
Charge discrepancies
SO-12345675,20 €5,55 €+0,35 €128Possible cause
SO-76543214,30 €4,80 €+0,50 €34To verify

Compare expected and actual

See differences by order and their economic context.

Demo data
Fee and dimension history

Reconstruct what changed

Review previous values, new values, and the date of the change.

Demo data
Discrepancy details
Expected
5,30 €
Charged
6,00 €
Difference
-0,70 €

Analyze the individual case

Open orders, amounts, and the information available for verification.

Demo data
SellerFeeInspector
Change detected: FBA fee4,60 € → 5,30 €Open the dashboard

Receive an immediate alert

Relevant changes appear by email and in the dashboard.

From connection to action

How it works

  1. 1Connect AmazonAuthorize the read-only connection in a few minutes.
  2. 2We sync every dayWe automatically collect and analyze the required data.
  3. 3Receive alertsWe notify you as soon as relevant changes are observed.
  4. 4Check chargesWe compare the expected amount with what was actually charged.
  5. 5Assess and actUnderstand the impact and decide how to act.

Current scope

What we monitor today

01FBA feesDaily monitoring and change history.
02Dimensions and weightComparison of the measurements provided by Amazon.
03Charges and discrepanciesComparison between expected and charged fees.
04Margins and inventoryAdditional context for understanding profitability.

Specialized, continuous, verifiable

Why SellerFeeInspector

FocusBuilt specifically to monitor Amazon fees and their changes.
Continuous monitoringDaily monitoring, alerts, and charge verification in one system.
In-depth fee analysisHistory, actual orders, differences, and context for informed decisions.

Security and permissions

Read-only access. No changes to your Amazon account.

SellerFeeInspector collects only the data required for monitoring and keeps access credentials protected.

  • Read-only connection to Amazon
  • No buyers' personal data downloaded
  • No changes to products, prices, offers, or settings
  • Access can be revoked from your Amazon account
  • Encrypted tokens and internal access controls

Beta Tester Program

Free access during the Beta, opened progressively

Try all available Beta features and help us validate the product with real data and cases.

  • All available Beta features
  • No small visible product limit
  • No subscription or automatic charge
  • Connect your account in about 5 minutes
Apply for the free BetaNo payment card required

Questions before connecting?

Frequently asked questions

Can SellerFeeInspector modify my Amazon account?

No. The connection is read-only and cannot modify products, prices, offers, or settings.

Do you download my customers' personal data?

No. SellerFeeInspector does not download buyers' personal data.

Is the Beta really free?

Yes. Access is free during the Beta and no payment card is required. Any future move to a commercial plan will always require your explicit choice.

How long does it take to connect Amazon?

Connecting normally takes about 5 minutes. The first synchronization may take longer depending on the available data.

When will I see useful data?

The system builds its history from the time you connect. Some checks become available after the relevant Amazon data is received.

Can I revoke access?

Yes. You can revoke authorization from your Amazon account.

Does SellerFeeInspector guarantee a refund from Amazon?

No. The system provides evidence to help you review the case, but Amazon makes the final decision on any claim or refund.

What happens after the Beta?

The end of the Beta and the available plans will be communicated in advance. There will be no automatic conversion or charge.

Do not wait to discover the problem after the impact has already added up.

Check today. Act promptly.
Apply for the free BetaNo payment card required · Read-only · About 5 minutes