# Schema Conformity — Equal-Width Histogram + Explicit Missing-Value Fill

> Schema Conformity — Equal-Width Histogram + Explicit Missing-Value Fill is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Generates an equal-width histogram and fills missing values for schema conformity metrics (valid_records, checked_records) across up to 200 supplied data rows, producing 2 independent analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-02-175?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/schema-conformity-equal-width-histogram-explicit-missing-value-fill-5edd99ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3XSznDIyJj-dpsc7AVg3x

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 schema-conformity-equal-width-histogram-explicit-missing-value-fill-5edd99ce -d '<json body>'
```

Example prompt: I have 150 rows of schema conformity data with valid_records and checked_records fields — some values are missing. Can you generate an equal-width histogram with 10 bins for the valid_records field, filling missing values using median imputation, and give me 2 analytical reports?

## When to prefer this

Choose this endpoint when you have up to 200 rows of schema conformity records (valid_records, checked_records) and need both a histogram of their distribution AND missing-value imputation in a single low-cost call. Ideal for data quality dashboards, pipeline audits, or pre-analysis cleanup where you want two complementary reports (distributional + imputed dataset) without building custom analytics.

## Known failure modes

- rows array exceeds 200 items — request rejected
- bins value outside 1–30 range — validation error
- required fields (row_id, date, valid_records, checked_records) missing from row objects — schema error
- date field does not match YYYY-MM-DD pattern — validation error
- field enum value not recognized — error
- all values for chosen field are null — histogram may be empty or degenerate
- payment of 0.01 USDC not provided — x402 payment required response

## How this service works

Schema conformity — Equal-width histogram + Explicit missing-value fill: Equal-width histogram + Explicit missing-value fill for supplied schema conformity records (valid_records, checked_records). 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 independent analytical reports covering: (1) an equal-width histogram showing bin ranges and row counts for the selected field (valid_records or checked_records), and (2) a version of the dataset with missing values explicitly filled using the specified method (zero, mean, or median). Results are computed locally from 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",
     "dataset_group",
     "date",
     "valid_records",
     "checked_records"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "dataset_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "valid_records": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "checked_records": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "dataset_group": "group-a",
     "valid_records": 10,
     "checked_records": 1
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "dataset_group": "group-b",
     "valid_records": 20,
     "checked_records": 2
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "dataset_group": "group-a",
     "valid_records": 15,
     "checked_records": 3
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "dataset_group": "group-b",
     "valid_records": 30,
     "checked_records": 4
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "valid_records",
    "checked_records"
   ],
   "type": "string",
   "default": "valid_records"
  },
  "method": {
   "enum": [
    "zero",
    "mean",
    "median"
   ],
   "type": "string",
   "default": "median"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/schema-conformity-equal-width-histogram-explicit-missing-value-fill-5edd99ce/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)