# Job Listing Inventories — Category Frequencies & Two-Measure Correlation

> Job Listing Inventories — Category Frequencies & 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 2026-10-19).

Computes category frequency distributions and Pearson/two-measure correlation between listing_count and duplicate_listings for supplied job listing inventory rows (up to 200 rows, two reports per call).

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-13-108?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/job-listing-inventories-category-frequencies-two-measure-correlation-feafaab3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LpHOMQiCdhFnK-izn647H

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 job-listing-inventories-category-frequencies-two-measure-correlation-feafaab3 -d '<json body>'
```

Example prompt: Can you run a category frequency analysis and a two-measure correlation between listing_count and duplicate_listings on my job listing inventory data? I have up to 200 rows with company_group, date, row_id, listing_count, and duplicate_listings fields — I need both reports in one call.

## When to prefer this

Choose this endpoint when you have up to 200 rows of job listing inventory data and need both a categorical frequency breakdown and a two-measure correlation between listing volume and duplicate count in a single paid call. It is best for offline/batch analytical use cases where no live data lookup, external enrichment, or prediction is needed — just fast local statistical computation on supplied data.

## Known failure modes

- More than 200 rows supplied — request rejected or truncated
- Missing required fields (row_id, company_group, date, listing_count, duplicate_listings) causing validation errors
- Malformed date strings not matching YYYY-MM-DD pattern
- All-null numeric columns preventing correlation computation
- Fewer than 2 rows making correlation statistically undefined
- Payment of 0.01 USDC not completed — x402 payment required before processing

## How this service works

Job listing inventories — Category frequencies + Two-measure correlation: Category frequencies + Two-measure correlation for supplied job listing inventories records (listing_count, duplicate_listings). 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) a category frequency table showing how often each company_group (and other categorical fields) appears in the supplied rows, and (2) a two-measure correlation report quantifying the statistical relationship between listing_count and duplicate_listings across all supplied records. No external data is fetched; all computation is performed locally on the provided rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/job-listing-inventories-category-frequencies-two-measure-correlation-feafaab3/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)