# Unit Return Rate – Distribution Summary

> Unit Return Rate – Distribution Summary is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Computes a statistical distribution summary (min, max, mean, median, percentiles, etc.) for unit return rates calculated from supplied pairs of sold and returned unit counts.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-sector-retail-unit-return-summary?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unit-return-rate-distribution-summary-fef26e00
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1f_mVU2fh7osmGLcItkGd

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-return-rate-distribution-summary-fef26e00 -d '<json body>'
```

Example prompt: Can you summarize the distribution of unit return rates across these retail records? I have 4 data points: 100 sold / 5 returned, 110 sold / 5.5 returned, 95 sold / 4 returned, and 120 sold / 6 returned — I want to see min, max, mean, median, and percentiles.

## When to prefer this

Choose this endpoint when you need a quick, local statistical distribution summary of unit return rates from your own retail figures without requiring live inventory access, platform integrations, or order execution. Ideal for offline scenario analysis, benchmarking return rate variability, or preparing inputs for further modeling.

## Known failure modes

- Fewer than 2 rows supplied — minimum 2 rows required
- returned_units or sold_units missing from a row — required fields
- sold_units equal to zero — exclusiveMinimum constraint violation
- Array exceeds 200 items — maxItems limit
- Non-numeric values passed for sold_units or returned_units — schema validation error

## How this service works

Unit return rate - Distribution summary: Distribution summary for Unit return 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 distribution summary deliverable.

## Output

A bounded distribution summary object containing statistical measures (such as minimum, maximum, mean, median, and percentiles) calculated from the unit return rates derived from each supplied pair of sold_units and returned_units values.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "returned_units",
     "sold_units"
    ],
    "properties": {
     "sold_units": {
      "type": "number",
      "default": 100,
      "maximum": 1000000000000,
      "minimum": 0,
      "exclusiveMinimum": 0
     },
     "returned_units": {
      "type": "number",
      "default": 5,
      "maximum": 1000000000000,
      "minimum": 0
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "sold_units": 100,
     "returned_units": 5
    },
    {
     "sold_units": 110.00000000000001,
     "returned_units": 5.5
    },
    {
     "sold_units": 100,
     "returned_units": 5
    },
    {
     "sold_units": 110.00000000000001,
     "returned_units": 5.5
    }
   ],
   "maxItems": 200,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unit-return-rate-distribution-summary-fef26e00/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)