# Observed Unit Sales Velocity – Named Scenario Comparison

> Observed Unit Sales Velocity – Named Scenario Comparison is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Compares named alternative scenarios against a baseline observed retail unit sales velocity (units sold per day), returning a bounded comparison report for up to 20 scenarios.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-retail-unit-sales-velocity-scenario?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/observed-unit-sales-velocity-named-scenario-comparison-022adfd2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_INtSATW0HrP_288LoxQB-

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 observed-unit-sales-velocity-named-scenario-comparison-022adfd2 -d '<json body>'
```

Example prompt: Compare my retail unit sales velocity for a baseline of 84 units sold over 7 days against two named scenarios: 'Promo Week' with 120 units sold over 7 days, and 'Extended Window' with 92 units sold over 14 days.

## When to prefer this

Use this endpoint when you need a fast, low-cost ($0.01 USDC) named scenario comparison of retail unit sales velocity from your own supplied figures — ideal for what-if analyses, promotional impact modeling, or benchmarking alternative sell-through periods without needing live market data or platform integration. Prefer this over general analytics tools when you want structured, bounded scenario reports with named labels for up to 20 alternatives in a single call.

## Known failure modes

- Missing or invalid baseline (sold_units or observed_days not provided or zero observed_days) returns validation error
- Scenarios array empty or exceeding 20 items returns schema violation
- Label field blank or exceeding 80 characters causes rejection
- Overrides object with no properties (minProperties:1 violated) causes error
- observed_days of exactly 0 rejected due to exclusiveMinimum constraint
- Payment failure or insufficient USDC balance blocks execution

## How this service works

Observed unit sales velocity - Named scenario comparison: Named scenario comparison for Observed unit sales velocity. Supplied retail figures only, up to 200 records. No platform access, live rates or order execution. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded named scenario comparison report.

## Output

A bounded named scenario comparison report listing unit sales velocity (units per day) for the baseline and each supplied named scenario, along with relative differences or deltas versus the baseline. Limited to supplied retail figures only — no live market data, platform access, or order execution. Up to 20 named scenarios per call, up to 200 records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "baseline": {
   "type": "object",
   "default": {
    "sold_units": 84,
    "observed_days": 7
   },
   "required": [
    "sold_units",
    "observed_days"
   ],
   "properties": {
    "sold_units": {
     "type": "number",
     "default": 84,
     "maximum": 1000000000000,
     "minimum": 0
    },
    "observed_days": {
     "type": "number",
     "default": 7,
     "maximum": 1000000000000,
     "minimum": 0,
     "exclusiveMinimum": 0
    }
   },
   "additionalProperties": false
  },
  "scenarios": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "label",
     "overrides"
    ],
    "properties": {
     "label": {
      "type": "string",
      "maxLength": 80,
      "minLength": 1
     },
     "overrides": {
      "type": "object",
      "properties": {
       "sold_units": {
        "type": "number",
        "default": 84,
        "maximum": 1000000000000,
        "minimum": 0
       },
       "observed_days": {
        "type": "number",
        "default": 7,
        "maximum": 1000000000000,
        "minimum": 0,
        "exclusiveMinimum": 0
       }
      },
      "minProperties": 1,
      "additionalProperties": false
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "label": "Supplied alternative",
     "overrides": {
      "sold_units": 92.4
     }
    }
   ],
   "maxItems": 20,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/observed-unit-sales-velocity-named-scenario-comparison-022adfd2/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)