# Unit Fill Rate – Local Finite-Change Elasticity Calculator

> Unit Fill Rate – Local Finite-Change Elasticity Calculator is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Computes the local finite-change elasticity of unit fill rate given baseline fulfilled/ordered unit figures and a step percentage, for retail scenario analysis.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-retail-unit-fill-elasticity?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unit-fill-rate-local-finite-change-elasticity-calculator-314ec0b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pKRNiwY8psxEuUpo_nLIM

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 unit-fill-rate-local-finite-change-elasticity-calculator-314ec0b4 -d '<json body>'
```

Example prompt: Calculate the local finite-change elasticity of the unit fill rate using a baseline of 950 fulfilled units out of 1000 ordered units, with a 1% step, analyzing sensitivity of the fulfilled_units field.

## When to prefer this

Choose this endpoint when you need a fast, local, offline finite-change elasticity calculation for unit fill rate using retail figures you already have — no live inventory connection, account access, or platform integration required. It is ideal for scenario analysis, sensitivity modeling, or benchmarking fill rate responsiveness without needing real-time data pipelines.

## Known failure modes

- Missing or zero ordered_units causing division errors
- fulfilled_units exceeding ordered_units in a way that produces nonsensical elasticity
- step_percent outside the allowed 0.01–10 range returns validation error
- Malformed baseline object missing required fields returns schema validation error
- Network or payment authorization failure returns HTTP 402 or 5xx

## How this service works

Unit fill rate - Local finite-change elasticity: Local finite-change elasticity for Unit fill rate. 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 local finite-change elasticity deliverable.

## Output

Returns a single bounded local finite-change elasticity value for the unit fill rate metric, computed from the provided baseline fulfilled/ordered unit figures and step percent. The result represents how the fill rate responds proportionally to a marginal finite change in the selected field.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "field": {
   "enum": [
    "fulfilled_units",
    "ordered_units"
   ],
   "type": "string",
   "default": "fulfilled_units"
  },
  "baseline": {
   "type": "object",
   "default": {
    "ordered_units": 100,
    "fulfilled_units": 95
   },
   "required": [
    "fulfilled_units",
    "ordered_units"
   ],
   "properties": {
    "ordered_units": {
     "type": "number",
     "default": 100,
     "maximum": 1000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    },
    "fulfilled_units": {
     "type": "number",
     "default": 95,
     "maximum": 1000000000000,
     "minimum": 0
    }
   },
   "additionalProperties": false
  },
  "step_percent": {
   "type": "number",
   "default": 1,
   "maximum": 10,
   "minimum": 0.01
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unit-fill-rate-local-finite-change-elasticity-calculator-314ec0b4/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)