# Save Files Analytics — Adjacent Row Changes + Two-Measure Correlation

> Save Files 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 2026-11-06).

Analyzes save file records to produce two reports: adjacent row changes for a chosen metric and two-measure correlation between save_kb and write_ms.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-game-13-158?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-06
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/save-files-analytics-adjacent-row-changes-two-measure-correlation-176d6ea4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VOh82CLI_JrffZbfhHtSX

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 save-files-analytics-adjacent-row-changes-two-measure-correlation-176d6ea4 -d '<json body>'
```

Example prompt: Can you analyze these game save records and give me both an adjacent row changes report for save_kb and a correlation between save_kb and write_ms? I have about 50 rows with fields for row_id, game_area, date, save_kb, and write_ms.

## When to prefer this

Choose this endpoint when you have sequential game save file records and need both a row-to-row change analysis and a correlation between save size and write time in a single $0.01 call. Ideal for game developers monitoring save performance across areas or patches. Prefer this over general-purpose stats tools when your data already conforms to the save_kb/write_ms schema and you want two bundled reports without setting up external analytics infrastructure.

## Known failure modes

- More than 200 rows submitted — request rejected at max item limit
- Missing required fields (row_id, game_area, date, save_kb, or write_ms) cause validation errors
- Invalid date format not matching YYYY-MM-DD pattern causes schema rejection
- Null values in save_kb or write_ms may affect correlation computation quality
- Field enum value outside [save_kb, write_ms] causes validation failure
- Empty rows array (minItems: 1 not met) causes rejection

## How this service works

Save files — Adjacent row changes + Two-measure correlation: Adjacent row changes + Two-measure correlation for supplied save files records (save_kb, write_ms). 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

Two analytical reports returned together: (1) an adjacent row changes report showing the delta between consecutive rows for the selected metric (save_kb or write_ms), and (2) a two-measure correlation report quantifying the statistical relationship between save_kb and write_ms across the supplied rows. Covers up to 200 rows of input data using local analytical engines with no external lookups.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/save-files-analytics-adjacent-row-changes-two-measure-correlation-176d6ea4/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)