# Observed Unit Sales Velocity - Distribution Histogram

> Observed Unit Sales Velocity - Distribution Histogram is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Generates a bounded distribution histogram of observed unit sales velocity (units sold per observed day) from up to 200 supplied retail data records.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-retail-unit-sales-velocity-histogram?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/observed-unit-sales-velocity-distribution-histogram-5cd19ca5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BB6kIRCPou5lXHlbPV_v5

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-distribution-histogram-5cd19ca5 -d '<json body>'
```

Example prompt: I have retail sales data for 150 products — each with units sold and the number of days observed — can you generate a distribution histogram using 10 bins so I can see how sales velocity is spread across my catalog?

## When to prefer this

Choose this endpoint when you have raw retail sales records with units sold and observation period (days) and need a statistical frequency distribution of the resulting velocity metric. It is purpose-built for retail unit sales velocity histogramming with configurable bin counts (1–30), handling up to 200 records per call. Prefer it over general statistics APIs when you specifically need a bounded histogram on this retail velocity metric at low cost ($0.01 USDC per call).

## Known failure modes

- Fewer than 2 rows supplied — minimum 2 records required
- More than 200 rows submitted — exceeds maximum record limit
- observed_days set to zero or negative — exclusiveMinimum constraint violated
- bins value outside 1–30 range — rejected by schema validation
- sold_units or observed_days missing from a row — required fields not present
- Non-numeric values in sold_units or observed_days fields

## How this service works

Observed unit sales velocity - Distribution histogram: Distribution histogram 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 distribution histogram report.

## Output

Returns a bounded distribution histogram report showing how unit sales velocity values (sold_units divided by observed_days) are distributed across the requested number of bins, including bin boundaries and frequency counts for up to 200 input retail records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "bins": {
   "type": "integer",
   "default": 5,
   "maximum": 30,
   "minimum": 1
  },
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "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
   },
   "default": [
    {
     "sold_units": 84,
     "observed_days": 7
    },
    {
     "sold_units": 92.4,
     "observed_days": 7.700000000000001
    },
    {
     "sold_units": 84,
     "observed_days": 7
    },
    {
     "sold_units": 92.4,
     "observed_days": 7.700000000000001
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/observed-unit-sales-velocity-distribution-histogram-5cd19ca5/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)