Click any fee in your analysis. You'll see the number, the published page it came from, and the date we last checked it. Click the link. Read the page. Check the number matches. That's it. We're not asking you to trust us. We're giving you the tools to verify us.
This page shows you how.
Every fee record in the database traces to a specific published page. Click the source link. Read the page. Check the number matches. We're not asking you to trust us. We're giving you the tools to verify us.
We monitor 1,257 source URLs for changes. When a rate card updates, every affected analysis recomputes automatically — you see the impact before your next login.
This is not a sample. 8,938 fee records across Amazon, eBay, Walmart, and Shopify — every rate, every tier, every weight band, every marketplace. Each one sourced. Each one verifiable.
Some tools compute your profit from what the platform's API reports. The calculation can be precise. The input can still be wrong.
If the platform misclassifies your product, applies the wrong fee tier, or charges a rate that doesn't match its published schedule — the API reports the wrong number. The tool faithfully computes with the wrong number. The profit calculation looks precise. It isn't accurate.
We start from a different place. Your fees are computed from each platform's published rate cards — the same documents the platform is contractually obligated to follow.
Copy this into ChatGPT, Claude, or whichever AI you use:
"If a profit analytics tool computes my margins from the same API data the platform provides, can it detect when the platform has charged me incorrectly? What would I need to catch fee errors — the platform's own data, or an independent source?"
See what it tells you.
We compute what the published rate card says each fee should be. But we can go further — upload your settlement report and we check every fee line independently.
One product. Every fee. Every source linked. Click any number and check it against the published page. If you find one that doesn't match — tell us. We'll fix it and update the source trail.
Amazon fees → · eBay fees → · Walmart fees → · Shopify fees →
Every number from published platform rate cards. Every source linked. Every calculation reproducible. About the person behind this →
Rates verified 25 June 2026.