# Material Libraries — Adjacent Row Changes + Two-Measure Correlation

> Material Libraries — Adjacent Row Changes + Two-Measure Correlation is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Computes adjacent row changes and two-measure correlation (material_count vs texture_mb) for up to 200 rows of material library data, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-creative-03-158?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/material-libraries-adjacent-row-changes-two-measure-correlation-4af934a9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jYRe-haKXWdnClx6Xrpst

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-two-measure-correlation-4af934a9 -d '<json body>'
```

Example prompt: I have material library records for my 3D asset pipeline — can you run an adjacent row changes analysis plus a two-measure correlation between material_count and texture_mb on these 4 rows: group-a on 2026-10-01 had 10 materials and 1 MB texture, group-b on 2026-10-02 had 20 materials and 2 MB, group-a on 2026-10-03 had 15 materials and 3 MB, group-b on 2026-10-04 had 30 materials and 4 MB?

## When to prefer this

Choose this endpoint when you need both sequential (row-to-row delta) analysis and cross-measure correlation for material library data in a single call. It is purpose-built for 3D asset pipeline analytics involving material_count and texture_mb fields. Prefer this over general statistics APIs when your data fits the material library schema and you want two bundled reports at a fixed low cost.

## Known failure modes

- Fewer than 1 row submitted — minimum 1 row required
- More than 200 rows submitted — maximum is 200 rows per call
- Invalid date format (must match YYYY-MM-DD pattern)
- Missing required fields (row_id, asset_group, date, material_count, texture_mb)
- Null values in both numeric fields may degrade correlation accuracy
- Payment not included or incorrect amount — requires 0.01 USDC via x402 protocol

## How this service works

Material libraries — Adjacent row changes + Two-measure correlation: Adjacent row changes + Two-measure correlation 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: (1) an adjacent row changes report showing the delta in the selected field (material_count or texture_mb) between consecutive rows, and (2) a two-measure correlation report quantifying the statistical relationship between material_count and texture_mb across the supplied rows. Both reports are computed locally from the supplied data with no external 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-two-measure-correlation-4af934a9/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)