Inventory & Ops · X post · source Oct 18, 2026
Q4 FBA Fee Traps Skill Pack for Claude Code
Find which SKUs will hit aged-inventory, peak storage or low-inventory fees, from Seller Central CSVs
Launch post and product page only, with no user results.
Per source From the tool's vendor, not independently tested.
Copy-paste prompt
Here are my Inventory Ledger, FBA Inventory and Fee Preview exports [attach]. List SKUs with units that will be 181+ days old at the next 15th snapshot, the estimated surcharge, and whether a removal order by the 14th is cheaper. Then list SKUs whose 30- and 90-day days of supply are both under 28 (low-inventory fee risk). Show every calculation.
The source didn't publish its exact prompt. We wrote this starter so you can try the same workflow. Replace anything in [brackets].
What they did
FBA Fee Guard is a skill pack for Claude Code (also Codex and Cursor). You export the Inventory Ledger, FBA Inventory and Fee Preview reports, put them in one folder, and ask the agent which SKUs will hit the next 15th aged-inventory snapshot, what Q4 peak storage looks like and what to clear versus keep. Python scripts run offline and print every calculation; fee rates sit in an editable file with Amazon source URLs and a last-verified date.
How it went
Launch post and product page only, with no user results. The maker says it needs no SP-API and no Seller Central login, and that blank rates stay blank so the skills ask you rather than invent numbers.
We only report what the source says. Results are self-reported unless noted.
Worth knowing
The maker sells it ($29 for four skills; the low-inventory-fee check is free for an email). Re-check fee rates against Amazon's help pages before acting, as the page itself advises.