# Tutorial Completion — Duplicate Key Report + Two-Measure Correlation

> Tutorial Completion — Duplicate Key Report + 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 2026-10-30).

Runs two local analytical reports on tutorial completion data: a duplicate key report and a Pearson/Spearman correlation between starts and completions, for up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-game-20-066?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tutorial-completion-duplicate-key-report-two-measure-correlation-c4b8f768
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oBryxRcLZHls9nTtDYu9H

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-duplicate-key-report-two-measure-correlation-c4b8f768 -d '<json body>'
```

Example prompt: Can you check my tutorial completion data for duplicate row keys and also tell me how strongly starts correlate with completions? I have records for each game area with dates, row IDs, starts, and completions — up to 200 rows.

## When to prefer this

Choose this endpoint when you have tutorial or game completion records (up to 200 rows) and need both a duplicate key audit and a starts-vs-completions correlation in a single low-cost call. Ideal for data quality checks before loading into a reporting pipeline, or for quick statistical validation of onboarding funnel data. Not suitable for live lookups, predictive modeling, datasets over 200 rows, or single-report-only needs.

## Known failure modes

- Fewer than 1 row submitted — request rejected
- More than 200 rows submitted — exceeds max limit, request rejected
- Missing required fields (row_id, game_area, date, starts, completions) — validation error
- Invalid date format (not YYYY-MM-DD) — schema validation failure
- Numeric values outside allowed range — schema rejection
- Insufficient variance in starts or completions to compute meaningful correlation — degenerate result

## How this service works

Tutorial completion — Duplicate key report + Two-measure correlation: Duplicate key report + 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) a duplicate key report identifying any rows sharing the same key/row_id, and (2) a two-measure correlation report quantifying the statistical relationship between the 'starts' and 'completions' numeric columns across the supplied rows. No external lookups or predictions are made; all computation is local.

## 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
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tutorial-completion-duplicate-key-report-two-measure-correlation-c4b8f768/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)