# Font Production Analytics — Adjacent Row Changes + Two-Measure Correlation

> Font Production Analytics — 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 2026-11-02).

Computes adjacent row-to-row changes and two-measure correlation for font production records (glyph_count, kerning_pairs) over up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-creative-18-158?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/font-production-analytics-adjacent-row-changes-two-measure-correlation-5ae57b94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OEbnyTAe8_EuCiuv-DyXP

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 font-production-analytics-adjacent-row-changes-two-measure-correlation-5ae57b94 -d '<json body>'
```

Example prompt: Analyze these font production records for me — run an adjacent row changes report and a two-measure correlation between glyph_count and kerning_pairs across my 12 rows of data, grouped by asset group and dated from 2025-01-01 through 2025-01-12.

## When to prefer this

Choose this endpoint when you have up to 200 font production records with glyph_count and kerning_pairs fields and need both sequential row-change analysis and cross-metric correlation in a single API call. It is best suited for offline or batch analytical workflows on already-collected data, where no live data lookup, prediction, or external enrichment is required. Prefer this over general-purpose analytics tools when working specifically within font production or creative asset pipelines using the x402 payment protocol.

## Known failure modes

- Fewer than 1 row submitted — minItems violation causes rejection
- More than 200 rows submitted — maxItems limit exceeded
- Invalid date format (not YYYY-MM-DD) causes schema validation failure
- Missing required fields (row_id, glyph_count, kerning_pairs) causes row rejection
- Null values in both metric fields may degrade correlation computation
- Invalid field enum value (not glyph_count or kerning_pairs) causes error

## How this service works

Font production — Adjacent row changes + Two-measure correlation: Adjacent row changes + Two-measure correlation for supplied font production records (glyph_count, kerning_pairs). 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 local analytical reports: (1) an adjacent row changes series showing the delta in the selected metric (glyph_count or kerning_pairs) between each consecutive row, and (2) a two-measure correlation report quantifying the statistical relationship between glyph_count and kerning_pairs across the supplied records. No external data is fetched; all analysis is performed on the submitted rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/font-production-analytics-adjacent-row-changes-two-measure-correlation-5ae57b94/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)