# Material Libraries — Adjacent Row Changes + Secondary-Measure Weighted Mean

> Material Libraries — Adjacent Row Changes + Secondary-Measure Weighted Mean is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Computes adjacent row-over-row changes and secondary-measure weighted mean analytics for supplied material library records (material_count, texture_mb) across up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-creative-03-159?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/material-libraries-adjacent-row-changes-secondary-measure-weighted-mean-fb3a9e4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7mT-kiFhdzxKYGzQl3c4H

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 material-libraries-adjacent-row-changes-secondary-measure-weighted-mean-fb3a9e4e -d '<json body>'
```

Example prompt: Analyze my material library data for asset groups — I have 4 rows: row-1 on 2026-10-01 (group-a, material_count=10, texture_mb=1), row-2 on 2026-10-02 (group-b, material_count=20, texture_mb=2), row-3 on 2026-10-03 (group-a, material_count=15, texture_mb=3), row-4 on 2026-10-04 (group-b, material_count=30, texture_mb=4) — give me the adjacent row changes and secondary-measure weighted mean for material_count.

## When to prefer this

Choose this endpoint when you have tabular material library data with material_count and texture_mb columns and need both row-over-row delta analysis and a weighted mean computed together in a single paid call. It is purpose-built for creative asset pipeline analytics (game dev, 3D content) rather than general-purpose statistical APIs, and bundles two reports for one flat fee of $0.01 USDC covering up to 200 rows.

## Known failure modes

- More than 200 rows submitted — request exceeds maxItems limit
- Missing required fields (row_id, asset_group, date, material_count, texture_mb) on any row
- Invalid date format — must match YYYY-MM-DD pattern
- Field selector not one of the two allowed enum values: material_count or texture_mb
- Null values in both measure fields may produce incomplete weighted mean calculation
- Payment of 0.01 USDC not fulfilled — x402 payment required

## How this service works

Material libraries — Adjacent row changes + Secondary-measure weighted mean: Adjacent row changes + Secondary-measure weighted mean for supplied material libraries records (material_count, texture_mb). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.

## Output

Returns two analytical reports for the supplied material library rows: (1) adjacent row changes showing the difference in the selected field (material_count or texture_mb) between consecutive rows, and (2) a secondary-measure weighted mean where one metric is weighted by the other. Results are computed locally on up to 200 supplied rows with no external data lookups.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "asset_group",
     "date",
     "material_count",
     "texture_mb"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "texture_mb": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "asset_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "material_count": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "texture_mb": 1,
     "asset_group": "group-a",
     "material_count": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "texture_mb": 2,
     "asset_group": "group-b",
     "material_count": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "texture_mb": 3,
     "asset_group": "group-a",
     "material_count": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "texture_mb": 4,
     "asset_group": "group-b",
     "material_count": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "material_count",
    "texture_mb"
   ],
   "type": "string",
   "default": "material_count"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/material-libraries-adjacent-row-changes-secondary-measure-weighted-mean-fb3a9e4e/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)