# Survey Participation String Normalisation and Two-Measure Correlation

> Survey Participation String Normalisation and 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 2026-11-03).

Normalises string fields and computes two-measure correlation between respondents and invitations for up to 200 survey participation records, producing two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-education-10-033?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/survey-participation-string-normalisation-and-two-measure-correlation-274cedf3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4lV_8Uyj1g83ozw1eaaxz

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 survey-participation-string-normalisation-and-two-measure-correlation-274cedf3 -d '<json body>'
```

Example prompt: Can you normalise the course group strings and run a two-measure correlation between respondents and invitations for my survey participation data — I have 4 rows across groups A and B from October 2026?

## When to prefer this

Choose this endpoint when you have tabular survey participation data with respondent and invitation counts per course group and date, and need both string normalisation and a two-measure correlation in a single low-cost call. Ideal for education analytics pipelines processing up to 200 rows without requiring live data lookups, predictions, or external enrichment.

## Known failure modes

- More than 200 rows submitted — request rejected or truncated
- Missing required fields (row_id, course_group, date, respondents, or invitations) cause validation errors
- Invalid date format (not YYYY-MM-DD) causes schema rejection
- Null or extreme numeric values for respondents/invitations may affect correlation reliability
- Insufficient data variance causes correlation to be undefined or degenerate

## How this service works

Survey participation — String normalisation + Two-measure correlation: String normalisation + Two-measure correlation for supplied survey participation records (respondents, invitations). 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 local analytical reports: (1) normalised string fields for course_group and related text columns across the supplied rows, and (2) a two-measure correlation result quantifying the statistical relationship between respondents and invitations across up to 200 input rows. No external lookups or predictions are made.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/survey-participation-string-normalisation-and-two-measure-correlation-274cedf3/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)