# Procurement Research — Two-Measure Correlation + Secondary-Measure Weighted Mean

> Procurement Research — Two-Measure Correlation + Secondary-Measure Weighted Mean is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Computes Pearson/rank correlation between quoted_amount and quoted_units, plus a weighted mean of the secondary measure, for up to 200 procurement research rows in two bundled analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-11-181?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/procurement-research-two-measure-correlation-secondary-measure-feb5a202
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6yc62y3Ln-jkIrG1d_GH-

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 procurement-research-two-measure-correlation-secondary-measure-feb5a202 -d '<json body>'
```

Example prompt: Can you run a two-measure correlation between quoted_amount and quoted_units, plus a weighted mean of quoted_units, on these 150 procurement quote rows I have? I want both reports in one call.

## When to prefer this

Choose this endpoint when you need both a correlation between quoted_amount and quoted_units AND a weighted mean of the secondary measure in a single paid call for procurement data specifically. It bundles two statistical reports for the price of one, making it efficient for procurement analytics workflows. Prefer it over general statistics APIs when your data matches the procurement research schema (row_id, company_group, date, quoted_amount, quoted_units) and you want offline, deterministic computation without any live lookups or predictions.

## Known failure modes

- Fewer than 1 row submitted — validation error
- More than 200 rows submitted — rejected with maxItems error
- Row missing required fields (row_id, company_group, date, quoted_amount, quoted_units) — schema validation failure
- Invalid date format (not YYYY-MM-DD) — pattern validation error
- Numeric values outside ±1,000,000,000,000 range — schema rejection
- All values null for a measure — correlation or weighted mean may be undefined/NaN
- Insufficient variance in data — correlation result may be 0 or undefined

## How this service works

Procurement research — Two-measure correlation + Secondary-measure weighted mean: Two-measure correlation + Secondary-measure weighted mean for supplied procurement research records (quoted_amount, quoted_units). 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 computed locally on the supplied rows: (1) a two-measure correlation statistic between quoted_amount and quoted_units, and (2) a weighted mean of the secondary measure (the non-selected field). No external data is fetched; results are derived purely from the submitted rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/procurement-research-two-measure-correlation-secondary-measure-feb5a202/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)