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Gross Margin Return on Inventory – Sequential Input-Change Attribution
x402
Gross Margin Return on Inventory – Sequential Input-Change Attribution is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).
Computes a sequential (waterfall) attribution of how changes in gross profit and average inventory cost each contributed to a shift in Gross Margin Return on Inventory (GMROI) between two periods.
Price / call$0.01
Success—
StatusUnknown
How this service works
Gross margin return on inventory - Sequential input-change attribution: Sequential input-change attribution for Gross margin return on inventory. Supplied retail figures only. Local calculation and scenario analysis; no live inventory, account access, platform fee lookup or order execution. One of 25 profiles or calculations across 20 shared operations in this sector. 0.01 USDC includes one bounded sequential input-change attribution deliverable.
Output
Returns a sequential (waterfall) attribution showing the before and after GMROI values, and how much of the total GMROI change is attributable to each input variable (gross profit change first, then average inventory cost change), allowing retail analysts to pinpoint the dominant driver of margin return shifts.
Example use cases
Quarterly GMROI driver breakdown
“Last quarter my gross profit was $80,000 and average inventory cost was $40,000; this quarter gross profit is $95,000 and inventory cost is $45,000. Do a sequential attribution to show me how much of the GMROI change came from the gross profit improvement versus the inventory cost increase.”
Inventory cost spike impact on margins
“Our average inventory cost jumped from $120,000 to $160,000 while gross profit stayed flat at $200,000. Run a waterfall attribution on our GMROI so I can see exactly how much that inventory cost spike hurt our return.”
Gross profit improvement scenario check
“I'm modeling a scenario where gross profit improves from $30,000 to $38,000 and inventory cost drops from $25,000 to $22,000. Can you attribute the total GMROI change sequentially so I understand which lever matters more?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-sector-retail-inventory-margin-return-waterfall?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to understand not just that GMROI changed, but exactly how much each input (gross profit vs. average inventory cost) independently drove that change via a sequential waterfall approach. It is ideal for retail finance teams doing period-over-period variance analysis, scenario planning, or board-level explanations of margin return shifts — and is fully local/offline in computation, requiring no live inventory system or platform connection.
Side effects
- Average inventory cost of zero or negative value causes a division-by-zero error — exclusiveMinimum enforced in schema
- Values exceeding ±1,000,000,000,000 are rejected by schema validation
- Missing required fields (gross_profit or average_inventory_cost in either before or after object) returns a validation error
- Malformed JSON body returns a 400-level error
- Payment not included or insufficient USDC results in x402 payment-required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | |
| before | object |
Tags
x402
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