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Friday Seller Tools – Amazon FBA Storage Overage Break-Even Calculator
x402
Friday Seller Tools – Amazon FBA Storage Overage Break-Even Calculator is a paid API for AI agents from friday-seller-tools-production.up.railway.app, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).
Calculates the break-even point for Amazon FBA storage overage fees, helping sellers determine when storage costs exceed profitability thresholds.
Price / call$0.5
Success—
StatusUnknown
How this service works
Instant, low-cost Amazon, Walmart, Shopify, and eBay listing, upload-preparation, advertising, and image-brief deliverables.
Output
Returns a job_id and queued status indicating the computation has been submitted; upon completion delivers the break-even unit count, break-even revenue figure, total storage overage cost, and profitability threshold data for the given FBA product parameters.
Example use cases
Q4 inventory overage decision
“I'm heading into Q4 with 1,200 units in FBA costing me $3.00/cubic foot in overage storage fees, selling at $35 with a $12 COGS — run the break-even calculation so I know if I should pull inventory or keep it warehoused at Amazon.”
Long-term storage fee impact analysis
“My ASIN has been sitting in FBA for 9 months and just hit long-term storage fees of $6.90 per cubic foot on 300 units — at a $22 sell price and $7 COGS, what's the storage overage break-even so I can decide whether to liquidate?”
New product FBA storage profitability check
“Before I send my new product into FBA, I want to model the break-even: 800 units, 15 cubic feet total, standard monthly storage at $0.75/cubic foot, selling for $19.99 with a $6 landed cost — what's the overage break-even threshold?”
Technical details
Endpoint
POSThttps://friday-seller-tools-production.up.railway.app/v1/amazon/fba/storage-overage-break-evenWhen to prefer
Choose this endpoint when an Amazon FBA seller needs a fast, low-cost ($0.50) computation of their storage overage break-even point — particularly useful during Q4 planning, long-term storage fee avoidance decisions, or new product FBA feasibility analysis. Prefer this over manual spreadsheet calculations or general-purpose FBA tools when you need a programmatic, agent-callable result integrated into a larger seller workflow.
Side effects
- Missing required fields (ASIN, volume, pricing) returns a 400 validation error
- Invalid or negative numeric inputs may cause computation errors
- Service may return queued status requiring polling for result retrieval
- Railway.app hosting may experience cold-start latency or downtime
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| rows | array | |
| scenarios | array | |
| horizon_months | integer | |
| amount_tolerance | number | |
| volume_tolerance | number |
Output
Schema · Response
{
"type": "json",
"example": {
"job_id": "example",
"status": "queued"
}
}Tags
x402
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