# Job Listing Inventories — Base-100 Series + Two-Measure Correlation

> Job Listing Inventories — Base-100 Series + 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 a Base-100 index series and a two-measure correlation report for supplied job listing inventory data (listing_count and duplicate_listings) across up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-13-165?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-base-100-series-two-measure-correlation-b9a4d446
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b6-ROPa9xqJQ6twGRsj6U

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-base-100-series-two-measure-correlation-b9a4d446 -d '<json body>'
```

Example prompt: Take my job listing records for group-a and group-b from October 2026 and run a Base-100 series starting from row 0 on listing_count, plus a two-measure correlation between listing_count and duplicate_listings — here are the 4 rows.

## When to prefer this

Choose this endpoint when you have pre-collected job listing inventory data (listing_count and duplicate_listings) and need offline statistical analysis — specifically a Base-100 normalization series and a pairwise correlation — without any live data lookup, external enrichment, or prediction. Best suited for up to 200 rows of historical or batch snapshot data where you want indexed trend comparison and correlation in a single low-cost call.

## Known failure modes

- Fewer than 1 row supplied — request rejected
- More than 200 rows supplied — exceeds limit
- base_index references a row index that doesn't exist in the submitted array
- Missing required fields (row_id, date, listing_count, duplicate_listings) on any row
- Date strings not matching YYYY-MM-DD pattern
- Base row value is zero, causing division-by-zero in the Base-100 calculation
- Null values in both measures preventing correlation computation

## How this service works

Job listing inventories — Base-100 series + Two-measure correlation: Base-100 series + 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 for the supplied rows: (1) a Base-100 indexed series showing each row's selected measure (listing_count or duplicate_listings) normalized relative to the chosen base row, and (2) a correlation report measuring the linear relationship between listing_count and duplicate_listings across all supplied 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
  },
  "field": {
   "enum": [
    "listing_count",
    "duplicate_listings"
   ],
   "type": "string",
   "default": "listing_count"
  },
  "base_index": {
   "type": "integer",
   "default": 0,
   "maximum": 199,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/job-listing-inventories-base-100-series-two-measure-correlation-b9a4d446/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)