# Demand-Variability Safety Stock Single Calculation

> Demand-Variability Safety Stock Single Calculation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Calculates the safety stock level needed to buffer against demand variability given a service level z-score, daily demand standard deviation, and lead time in days.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-retail-safety-stock-calculate?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/demand-variability-safety-stock-single-calculation-f36a58db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3YF_om97H3uaXpNww3Yk3

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability demand-variability-safety-stock-single-calculation-f36a58db -d '<json body>'
```

Example prompt: Calculate the safety stock I need for demand variability: my lead time is 10 days, daily demand standard deviation is 4 units, and I want a 95% service level (z-score 1.65).

## When to prefer this

Use this endpoint when you need a fast, low-cost single-point safety stock calculation driven purely by demand variability (not supply-side variability). It is ideal for retail scenario analysis and what-if comparisons across service levels. Prefer this over more complex inventory tools when you only need the demand-variability component and already have your z-score, standard deviation, and lead time ready.

## Known failure modes

- Missing required fields (service_z, daily_demand_stddev, lead_days) results in validation error
- Values outside allowed ranges (e.g. service_z > 5, negative lead_days) are rejected
- Payment failure or insufficient USDC balance prevents calculation
- Network timeout on the endpoint returns no result

## How this service works

Demand-variability safety stock - Single calculation: Single calculation for Demand-variability safety stock. 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 single calculation deliverable.

## Output

Returns a single computed safety stock quantity based on the formula: safety_stock = service_z × daily_demand_stddev × sqrt(lead_days). Output is a bounded numeric deliverable representing the buffer inventory units needed to meet the specified service level under demand variability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "values": {
   "type": "object",
   "default": {
    "lead_days": 10,
    "service_z": 1.65,
    "daily_demand_stddev": 4
   },
   "required": [
    "service_z",
    "daily_demand_stddev",
    "lead_days"
   ],
   "properties": {
    "lead_days": {
     "type": "number",
     "default": 10,
     "maximum": 1000000000000,
     "minimum": 0
    },
    "service_z": {
     "type": "number",
     "default": 1.65,
     "maximum": 5,
     "minimum": 0
    },
    "daily_demand_stddev": {
     "type": "number",
     "default": 4,
     "maximum": 1000000000000,
     "minimum": 0
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/demand-variability-safety-stock-single-calculation-f36a58db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)