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Inventory Safety Stock & Reorder Point (ROP) Calculator
x402
Inventory Safety Stock & Reorder Point (ROP) Calculator is a paid API for AI agents from x402-niche-briefs.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Computes safety stock units, days of cover, reorder point trigger, and recommended 60-day PO quantity from daily sales velocity, supplier lead time, and target service level.
Price / call$0.01
Success—
StatusUnknown
How this service works
Deterministic inventory safety stock and Reorder Point (ROP) calculator for long-lead-time supply chains. Pass ?daily_units=15&lead_time_days=35&service_level_pct=95. Computes Z-score buffer across combined demand and lead-time variance, returning safety stock units, days of cover, ROP trigger units, and 60-day PO quantity.
Output
Returns a JSON object with: the input echo (daily_units, lead_time_days, service_level_pct), assumptions used (Z-score, assumed demand CV%, assumed lead-time CV%), and computed inventory_targets including lead_time_demand_units, safety_stock_units, safety_stock_days_of_cover, reorder_point_rop_units, reorder_trigger_days_of_stock_remaining, and recommended_60_day_order_qty_units.
Example use cases
Import SKU reorder planning
“I import a product from overseas with a 45-day lead time and it sells about 20 units per day. Can you calculate my safety stock and reorder point at a 98% service level so I don't stock out?”
Amazon FBA replenishment trigger
“My FBA SKU moves 8 units a day and my manufacturer takes 30 days to produce and ship. What's my reorder point and how much safety stock should I be holding at a 95% service level?”
60-day purchase order sizing
“I need to place a PO for a product with 12 daily units sold and a 28-day lead time. Can you tell me the recommended 60-day order quantity and when I should trigger the reorder at a 90% service level?”
Technical details
Endpoint
GEThttps://x402-niche-briefs.fly.dev/v1/reorder-point-safety-stock?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, deterministic, formula-based safety stock and ROP calculation for long-lead-time supply chains (import, overseas manufacturing) without needing historical demand data or probabilistic simulation. Ideal for ecommerce operators, Amazon sellers, and importers who want a quick, defensible inventory target from three simple inputs.
Side effects
- Missing required parameters daily_units or lead_time_days returns an error
- service_level_pct outside 50–99.9 range may produce unexpected Z-score results
- Non-numeric string values for numeric fields may cause computation failure
- Very high lead times or service levels may produce extremely large safety stock recommendations that should be validated manually
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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