Securely connect
Authorize EvenFee through Amazon's official Selling Partner API. Access is limited to your own account's data, granted by you — and revocable at any time. No password sharing.
FBA fee recovery for Amazon sellers
Recover the Amazon FBA fees you were overcharged.
Amazon sometimes records the wrong product dimensions or weight — pushing your items into a higher size tier and overcharging fulfillment & storage fees on every unit you sell. EvenFee finds those errors and helps you get the money back.
Pay when we recover
Read-only authorization
Revoke anytime
EvenFee audit
Illustration
SKU EX-1042 · Standard catalog item
Amazon recorded
Large standard
Re-measured
Standard size
17.4 × 11.8 × 0.8 in · 0.9 lb (re-measured)
Lower size tier — overcharge identified on every unit
Read-only
Official SP-API
No buyer data
The problem
A measurement error becomes a recurring overcharge.
Amazon calculates FBA fulfillment and storage fees from each product's recorded dimensions and weight. If a unit is measured even slightly too large or too heavy, Amazon can place it in a higher size tier — and you're overcharged on every single unit, on every order, until the error is corrected.
Wrong dimensions → wrong size tier
A few millimetres or grams can bump a product from one fee tier into a more expensive one.
Overcharged on every unit
The inflated fee applies to each unit shipped and each unit stored — not just once.
It compounds — and it's easy to miss
Across a catalog and months of sales, small per-unit errors quietly add up to real money.
Same product, two outcomes
Illustration
Measured correctly
Standard tier · lower fee
Recorded too large
Oversize tier · higher fee
The difference is billed on every unit you sell until corrected.
How it works
From audit to recovery in four steps.
A clear, secure process built around your authorization — with no access to buyer data at any point.
We audit your fees
We analyze your FBA fees and dimension/weight records to detect measurement-related overcharges and size-tier misclassifications across your catalog.
We help you reclaim
We help you trigger re-measurements and prepare and file reimbursement claims for the overcharges we find, through Amazon's standard processes.
You recover & stay protected
You recover money you were owed — and ongoing monitoring flags new measurement errors before they cost you more.
Why EvenFee
Purpose-built, low-risk, and respectful of your data.
Success-based pricing
A small monthly subscription plus a success fee charged only on amounts we actually help you recover. No recovery, no success fee.
No buyer data, ever
We never access buyer names, addresses, or any buyer personal data. We only look at your own fee and operations data.
Encrypted & secure
Your data is encrypted in transit (TLS) and at rest. Access is restricted and credentials are stored in a secrets manager.
Continuous monitoring
Measurement errors recur. We keep watching so new size-tier overcharges are caught early — not months later.
Purpose-built for FBA
Focused on one thing — dimension and weight-driven FBA fee errors — instead of being a generic, do-everything dashboard.
You stay in control
Read-only authorization via the official SP-API, and you can revoke EvenFee's access from Amazon at any time.
Security & trust
Built to handle your data carefully.
EvenFee handles fees and financial data, so security and restraint are the defaults — not add-ons.
Official Amazon authorization
You connect through Amazon's official Selling Partner API using Amazon's secure authorization flow. We never ask for your Amazon password.
Only your own seller data
Your FBA fee, inventory, shipment, and financial data — used solely to audit fees and prepare your reimbursement claims.
No buyer personal data
We do not request, access, or store buyer names, shipping addresses, contact details, or any buyer PII.
Encrypted in transit & at rest
TLS in transit and encryption at rest. Access is restricted on a need-to-know basis, and secrets are kept in a secrets manager.
GDPR-compliant (EU)
EvenFee is operated from the EU (Portugal). You can access or delete your data and exercise your GDPR rights at any time.
Revoke access anytime
Revoke EvenFee's access from your Amazon account whenever you choose. We delete your data after revocation.
Read our Privacy Policy
Minimal data · No PII · Encrypted · Revocable
Pricing
Simple, success-based pricing.
You shouldn't take on risk to recover money you're already owed. EvenFee combines a small subscription with a success fee charged only on what we actually recover.
Small monthly subscription
A modest recurring fee that keeps your catalog continuously audited and monitored for new measurement errors.
- Ongoing audits across your catalog
- Continuous monitoring for new errors
- No long-term contract — cancel anytime
Success fee on recoveries
A percentage of the overcharges we actually help you recover. If we don't recover anything, you pay no success fee.
- Charged only on recovered amounts
- Fully aligned with your results
- Transparent, itemized reporting
EvenFee is a new, independent service and we price transparently. Contact us for current rates and to start a free, no-obligation fee audit.
FAQ
Questions, answered honestly.
Is EvenFee affiliated with Amazon?
No. EvenFee is an independent service and is not affiliated with, endorsed by, or sponsored by Amazon. We integrate with Amazon's official Selling Partner API (SP-API) only with your authorization.
What data does EvenFee access?
Only your own seller account's FBA fee, inventory, shipment, and financial data, accessed via Amazon's SP-API. We never access buyer names, addresses, or any buyer personal data. See our Privacy Policy for full details.
How does EvenFee get paid?
A small monthly subscription plus a success fee charged only on amounts we actually help you recover. If there's no recovery, there's no success fee.
Can I revoke EvenFee's access?
Yes — at any time, directly from your Amazon Seller Central account. When you revoke access, we stop processing your data and delete it, except where limited records must be kept to meet legal obligations.
Do you guarantee a recovery amount?
No. Outcomes depend on your specific account and Amazon's review of each claim. Because our success fee only applies to amounts that are actually recovered, our incentives stay aligned with yours.
Where is EvenFee based?
EvenFee is operated by an independent sole proprietor based in Portugal (EU), and follows GDPR for any personal data it processes.
Get a free fee audit
Find out what Amazon may owe you.
Send us a message and we'll run a free, no-obligation audit of your FBA fees for measurement-related overcharges. You only pay if we recover.
- No obligation — we reply by email
- Read-only authorization, revoke anytime
- No buyer data accessed, ever
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