# Market Survey Observations — String Normalisation + Two-Measure Correlation

> Market Survey Observations — String Normalisation + 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 2026-10-15).

Normalises string fields and computes correlation between respondent_count and sample_weight across up to 200 market survey observation rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-06-033?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/market-survey-observations-string-normalisation-two-measure-correlation-89d5a5a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rz3b5CAhgvhXZynL5Mg-i

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 market-survey-observations-string-normalisation-two-measure-correlation-89d5a5a8 -d '<json body>'
```

Example prompt: Run string normalisation and a correlation analysis between respondent_count and sample_weight on my market survey data — I have 4 rows with company groups 'group-a' and 'group-b', dated from 2026-10-01 to 2026-10-04, with respondent counts 10, 20, 15, 30 and sample weights 1, 2, 3, 4.

## When to prefer this

Choose this endpoint when you have market survey tabular data and need both string field normalisation and a statistical correlation between respondent count and sample weight in a single low-cost call. Ideal for preprocessing survey exports before reporting, validating weighting schemes, or quickly checking measure relationships without setting up a local analytics environment. At $0.01 USDC for two reports on up to 200 rows, it is cost-effective for routine survey QA pipelines.

## Known failure modes

- Exceeds 200 rows limit — request rejected
- Missing required fields (row_id, date, respondent_count, sample_weight) — validation error
- Null values in both numeric measures preventing correlation computation
- Invalid date format not matching YYYY-MM-DD pattern
- Empty rows array — minimum 1 row required

## How this service works

Market survey observations — String normalisation + Two-measure correlation: String normalisation + Two-measure correlation for supplied market survey observations records (respondent_count, sample_weight). 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

Two analytical reports: (1) a string normalisation report covering the company_group and related string fields across submitted rows, and (2) a Pearson or equivalent correlation report between respondent_count and sample_weight, computed locally without any external lookup or live data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "company_group",
     "date",
     "respondent_count",
     "sample_weight"
    ],
    "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
     },
     "sample_weight": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "respondent_count": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "company_group": "group-a",
     "sample_weight": 1,
     "respondent_count": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "company_group": "group-b",
     "sample_weight": 2,
     "respondent_count": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "company_group": "group-a",
     "sample_weight": 3,
     "respondent_count": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "company_group": "group-b",
     "sample_weight": 4,
     "respondent_count": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-survey-observations-string-normalisation-two-measure-correlation-89d5a5a8/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)