Pay once · No Friday subscription
Recompute fee deductions and net proceeds without letting opposite-direction differences cancel.
Included in the $9.00 Shelf Kit
Mercari sellers and bookkeepers checking seller-redacted completed-sale rows against the fee terms shown in their own source records before a human reviews any Balance question.
Delivery: usually a structured result, workbook, or ZIP depending on the tool.
Friday performs arithmetic only on seller-supplied sale dates, references, listing and SKU aliases, currency, proceeds-before-fees basis, fee bases, percentages, flat amounts, recorded deductions, and recorded net proceeds. It reads no Mercari account, sales report, Balance, sale, listing, or fee schedule and verifies no source field. Mercari alone determines the applicable fee structure, bases, taxes, shipping deductions, refunds, and actual net proceeds. A difference is a bookkeeping review lead, not proof of a wrong charge, missing payout, refund, credit, or amount owed. Friday opens no case, files no dispute, requests no credit, moves no money, changes no listing, price, shipping, Balance, or seller account, and does not publish listings.
Synthetic sample
{
"row_count": 5,
"mismatch_count": 3,
"fee_mismatch_count": 2,
"net_proceeds_mismatch_count": 2,
"high_exposure_count": 2,
"total_proceeds_before_fees": 440.0,
"total_recomputed_selling_service_fee": 44.0,
"total_recorded_selling_service_fee": 44.05,
"total_recomputed_processing_fee": 15.28,
"total_recorded_processing_fee": 15.53,
"total_recomputed_fee": 59.28,
"total_recorded_fee": 59.58,
"total_recomputed_net_proceeds": 380.72,
"total_recorded_net_proceeds": 380.15,
"possible_fee_overcharge": 0.55,
"recorded_below_recomputed_fee": 0.25,
"possible_net_proceeds_shortfall": 0.57,
"recorded_above_recomputed_net_proceeds": 0.0,
"review_queue_preview": [
{
"priority_rank": 1,
"reference": "NW-MERC-001",
"status": "review_fee_and_net_mismatch",
"selling_service_fee_discrepancy": 0.3,
"processing_fee_discrepancy": 0.0,
"net_proceeds_discrepancy": -0.3,
"possible_fee_overcharge": 0.3,
"possible_net_proceeds_shortfall": 0.3
},
{
"priority_rank": 2,
"reference": "NW-MERC-003",
"status": "review_fee_mismatch",
"selling_service_fee_discrepancy": -0.25,
"processing_fee_discrepancy": 0.25,
"total_fee_discrepancy": 0.0
},
{
"priority_rank": 3,
"reference": "NW-MERC-002",
"status": "review_net_mismatch",
"net_proceeds_discrepancy": -0.27
}
],
"component_summaries": [
{
"component": "selling_service",
"recomputed_amount": 44.0,
"recorded_amount": 44.05,
"possible_overcharge": 0.3,
"recorded_below_recomputed": 0.25,
"mismatch_count": 2
},
{
"component": "payment_processing",
"recomputed_amount": 15.28,
"recorded_amount": 15.53,
"possible_overcharge": 0.25,
"recorded_below_recomputed": 0.0,
"mismatch_count": 1
}
],
"publish_status": "draft_needs_review",
"safety": "Arithmetic on seller-supplied fee terms, recorded deductions, and net proceeds only. It reads no Mercari account or Balance, embeds no fee schedule, claims no charge wrong or payout owed, files no dispute, moves no money, publishes no listing, and changes nothing."
}
This sample uses synthetic facts. Your output is generated only from the facts you submit.
POST /v1/mercari/finance/selling-payment-processing-fee-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.