Safety stock calculator API

Compute safety stock SS = z·σ·sqrt(leadTime) with the service-level z from the inverse-normal CDF — the buffer that protects a target service level against demand variability. Answers 'how much safety stock do I need','safety stock for 95% service level','buffer inventory for demand variability'.

Price$0.01per request

MethodPOST

Route/v1/calc/logi-safety-stock

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calclogisticsinventorysafety-stockservice-levelbuffersupply-chainz-score

API URLhttps://x402.hexl.dev/v1/calc/logi-safety-stock

Integration docs

Example request

{
  "serviceLevel": 0.95,
  "demandStdDev": 20,
  "leadTimeDays": 9
}

Example response

{
  "formula": "SafetyStock = z · σ_demand · sqrt(leadTime)",
  "serviceLevel": 0.95,
  "zScore": 1.6449,
  "safetyStock": 98.69,
  "interpretation": "Hold 98.69 units of safety stock to cover demand variability over a 9-day lead time at a 95.0% service level.",
  "inputs": {
    "serviceLevel": 0.95,
    "demandStdDev": 20,
    "leadTimeDays": 9
  }
}

Input schema

{
  "type": "object",
  "required": [
    "serviceLevel",
    "demandStdDev",
    "leadTimeDays"
  ],
  "properties": {
    "serviceLevel": {
      "type": "number",
      "description": "target cycle service level (0-1)",
      "examples": [
        0.95
      ]
    },
    "demandStdDev": {
      "type": "number",
      "description": "std dev of daily demand σ",
      "examples": [
        20
      ]
    },
    "leadTimeDays": {
      "type": "number",
      "examples": [
        9
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}