# Tutorial Completion — Adjacent Row Changes + Two-Measure Correlation

> Tutorial Completion — 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 2026-10-25).

Analyzes tutorial completion data (starts and completions) by computing adjacent row changes and two-measure correlation across up to 200 rows, returning two independent analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-game-20-158?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tutorial-completion-adjacent-row-changes-two-measure-correlation-4354332d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hXYHV114jmNPcaFyyC5TE

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 tutorial-completion-adjacent-row-changes-two-measure-correlation-4354332d -d '<json body>'
```

Example prompt: Can you run adjacent row change analysis and a two-measure correlation on my tutorial completion data — I have rows with dates, game areas, starts, and completions across group-a and group-b from October 1–4, 2026, and I want to analyze the 'starts' field?

## When to prefer this

Choose this endpoint when you need both adjacent row change detection and two-measure correlation in a single low-cost call ($0.01 USDC) on supplied tutorial completion data up to 200 rows, without needing external data lookups, predictions, or professional assessments. Ideal for game developers or learning platform analysts who already have their data structured with row_id, game_area, date, starts, and completions and want fast local statistical computation.

## Known failure modes

- More than 200 rows submitted — request exceeds maxItems limit and will be rejected
- Missing required fields (row_id, game_area, date, starts, completions) on any row causes validation failure
- Invalid date format (not YYYY-MM-DD) triggers schema validation error
- field enum value not 'starts' or 'completions' causes rejection
- Null values in starts/completions may affect correlation computation quality

## How this service works

Tutorial completion — Adjacent row changes + Two-measure correlation: Adjacent row changes + Two-measure correlation for supplied tutorial completion records (starts, completions). 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 independent analytical reports: (1) adjacent row changes showing delta values between consecutive rows for the selected measure, and (2) a two-measure correlation report quantifying the statistical relationship between starts and completions across the supplied dataset — all computed locally from the provided data with no external lookups.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tutorial-completion-adjacent-row-changes-two-measure-correlation-4354332d/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)