# Market Survey Observations — Adjacent Row Changes + Equal-Width Histogram

> Market Survey Observations — Adjacent Row Changes + Equal-Width Histogram 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 adjacent row changes and an equal-width histogram for market survey observation fields (respondent_count or sample_weight) across up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-06-156?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-adjacent-row-changes-equal-width-histogram-6334a56d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VlVlJQXyZFI5YnD72eVP5

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-adjacent-row-changes-equal-width-histogram-6334a56d -d '<json body>'
```

Example prompt: Analyze my market survey data — I have 4 rows with respondent_count values (10, 20, 15, 30) for groups A and B from October 1–4 2026, and I want both the adjacent row changes and an equal-width histogram using 5 bins for the respondent_count field.

## When to prefer this

Choose this endpoint when you need two complementary statistical views — sequential change detection and distribution bucketing — on market survey observation data (respondent counts or sample weights) in a single API call. It is ideal for survey analysts who want both temporal delta analysis and frequency distribution without running separate queries. Best suited for datasets up to 200 rows where local, stateless computation on supplied data is sufficient and no external data enrichment or forecasting is needed.

## Known failure modes

- More than 200 rows submitted — request will be rejected
- Invalid date format (non-YYYY-MM-DD) causes validation error
- Field value not in enum ['respondent_count','sample_weight'] causes rejection
- Bin count outside 1–30 range causes validation error
- Null values in the selected field may affect histogram binning
- Missing required row fields (row_id, date) cause schema validation failure

## How this service works

Market survey observations — Adjacent row changes + Equal-width histogram: Adjacent row changes + Equal-width histogram 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

Returns two analytical reports: (1) adjacent row changes showing the delta in the selected field between consecutive survey rows, and (2) an equal-width histogram partitioning the selected field values into the specified number of bins with counts per bin. Both reports are computed locally from the supplied data with no external lookups.

## 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",
     "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
  },
  "field": {
   "enum": [
    "respondent_count",
    "sample_weight"
   ],
   "type": "string",
   "default": "respondent_count"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-survey-observations-adjacent-row-changes-equal-width-histogram-6334a56d/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)