Pay once · No Friday subscription
Find utilization-surcharge lines whose seller-supplied math does not add up.
Included in the $9.00 Shelf Kit
Amazon FBA sellers, agencies, and finance teams checking seller-supplied storage-utilization surcharge lines before a human verifies the source volume, utilization band, rate, and charge.
Delivery: usually a structured result, workbook, or ZIP depending on the tool.
Friday performs arithmetic only on the seller-supplied report label, billing month, SKU references, utilization ratio and band label, charged volume, rate, and recorded surcharge. It reads no Amazon account, report, inventory record, measurement, ratio calculation, or fee schedule and never assigns or validates a band. A difference is not proof that a charge is wrong or a credit is due. Friday opens no case, files no dispute, requests no remeasurement, does not publish listings, and changes no fee, inventory, shipment, listing, price, or account.
Synthetic sample
{
"row_count": 5,
"mismatch_count": 3,
"total_charged_volume_cubic_feet": 290.0,
"total_recorded_surcharge": 378.0,
"total_recomputed_surcharge": 370.0,
"net_recorded_minus_recomputed_surcharge": 8.0,
"possible_overcharge_exposure": 13.0,
"recorded_below_recomputed_amount": 5.0,
"review_queue_preview": [
{
"priority_rank": 1,
"sku": "NW-BOTTLE-20",
"billing_month": "2026-06",
"utilization_ratio_band": "26-39 weeks",
"recorded_minus_recomputed_surcharge": 10.0,
"status": "positive_difference"
},
{
"priority_rank": 2,
"sku": "NW-SCARF-01",
"billing_month": "2026-07",
"utilization_ratio_band": "52+ weeks",
"recorded_minus_recomputed_surcharge": 3.0,
"status": "positive_difference"
},
{
"priority_rank": 3,
"sku": "NW-LAMP-08",
"billing_month": "2026-07",
"utilization_ratio_band": "40-52 weeks",
"recorded_minus_recomputed_surcharge": -5.0,
"status": "recorded_below_recomputed"
}
],
"publish_status": "draft_needs_review",
"safety": "Arithmetic on seller-supplied utilization ratios, band labels, volumes, rates, and charges only. No band is assigned, no charge is called wrong, no credit is claimed, and no case, listing, inventory, fee, or account is changed."
}
This sample uses synthetic facts. Your output is generated only from the facts you submit.
POST /v1/amazon/fba/storage-utilization-surcharge-verification
Exact x402 price: $0.50. Use the public OpenAPI schema and Base USDC payment flow. The response returns a private job URL and temporary token.