# Job Listing Inventories — Equal-Width Histogram + Two-Measure Correlation

> Job Listing Inventories — Equal-Width Histogram + 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 an equal-width histogram and a two-measure Pearson/Spearman correlation report for supplied job listing inventory records (listing_count and duplicate_listings) using local analytical engines.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-13-171?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-equal-width-histogram-two-measure-correlation-ae6a17d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SDYAmvfc8CN95-CBVtr1B

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-equal-width-histogram-two-measure-correlation-ae6a17d0 -d '<json body>'
```

Example prompt: Can you run a histogram with 10 bins on the listing_count field and also compute the correlation between listing_count and duplicate_listings for this job inventory dataset: [row-1, group-a, 2024-01-01, 120, 5], [row-2, group-b, 2024-01-02, 340, 18], [row-3, group-a, 2024-01-03, 210, 9]?

## When to prefer this

Choose this endpoint when you need simultaneous histogram distribution analysis and two-measure correlation on job listing inventory data (listing_count vs duplicate_listings) without requiring external data sources, live lookups, or predictions. Ideal for offline or batch analytical pipelines processing up to 200 records at a time where cost-efficiency ($0.01 for two reports) matters. Prefer it over general-purpose statistics APIs when your data is already in the required job-listing schema format.

## Known failure modes

- Input exceeds 200 rows — request will be rejected or truncated
- Missing required fields (row_id, listing_count, duplicate_listings) cause validation errors
- Null values in both measure columns may produce undefined or NaN correlation
- bins value outside 1–30 range returns a validation error
- Fewer than 2 valid rows with non-null values yields degenerate statistics
- Malformed date strings not matching YYYY-MM-DD pattern fail schema validation

## How this service works

Job listing inventories — Equal-width histogram + Two-measure correlation: Equal-width histogram + 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 independent analytical reports: (1) an equal-width histogram of the selected field (listing_count or duplicate_listings) divided into the requested number of bins, including bin edges and row counts per bin; and (2) a two-measure correlation report between listing_count and duplicate_listings across the supplied rows, indicating the strength and direction of their statistical relationship.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "bins": {
   "type": "integer",
   "default": 5,
   "maximum": 30,
   "minimum": 1
  },
  "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
  },
  "field": {
   "enum": [
    "listing_count",
    "duplicate_listings"
   ],
   "type": "string",
   "default": "listing_count"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/job-listing-inventories-equal-width-histogram-two-measure-correlation-ae6a17d0/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)