# Feature Availability String Normalisation and Missing-Value Fill

> Feature Availability String Normalisation and 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 2026-11-03).

Normalises string representations and fills missing values in feature availability records (populated_features, expected_features) for up to 200 rows, producing 2 analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-10-037?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/feature-availability-string-normalisation-and-missing-value-fill-21eb0bf3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KpKM1nqc6tzp52p7BfKhf

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 feature-availability-string-normalisation-and-missing-value-fill-21eb0bf3 -d '<json body>'
```

Example prompt: I have a set of feature availability records across two groups — 'group-a' and 'group-b' — with dates from 2026-10-01 to 2026-10-04 and some missing values in populated_features. Can you normalise the strings and fill those missing values using median imputation, and give me back 2 analytical reports?

## When to prefer this

Choose this endpoint when you need lightweight, local string normalisation and missing-value imputation specifically for feature availability records (populated_features / expected_features) without requiring a live data connection, external prediction, or professional assessment. Ideal for preprocessing pipelines handling up to 200 rows that need two co-produced analytical reports in a single low-cost call ($0.01 USDC).

## Known failure modes

- More than 200 rows submitted — request rejected (maxItems exceeded)
- Missing required fields (row_id, date, dataset_group, populated_features, expected_features) on any row — validation error
- Date field does not match YYYY-MM-DD pattern — schema validation failure
- populated_features or expected_features values outside allowed numeric range — rejection
- Invalid fill method or field enum value — schema validation error
- Payment not included or insufficient USDC — x402 payment required error

## How this service works

Feature availability — String normalisation + Explicit missing-value fill: String normalisation + Explicit missing-value fill for supplied feature availability records (populated_features, expected_features). 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 2 analytical reports covering (1) string-normalised and (2) missing-value-filled feature availability records for the submitted rows, processed locally with no external lookups or predictions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "row_id",
     "dataset_group",
     "date",
     "populated_features",
     "expected_features"
    ],
    "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
     },
     "expected_features": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "populated_features": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "dataset_group": "group-a",
     "expected_features": 1,
     "populated_features": 10
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "dataset_group": "group-b",
     "expected_features": 2,
     "populated_features": 20
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "dataset_group": "group-a",
     "expected_features": 3,
     "populated_features": 15
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "dataset_group": "group-b",
     "expected_features": 4,
     "populated_features": 30
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "populated_features",
    "expected_features"
   ],
   "type": "string",
   "default": "populated_features"
  },
  "method": {
   "enum": [
    "zero",
    "mean",
    "median"
   ],
   "type": "string",
   "default": "median"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/feature-availability-string-normalisation-and-missing-value-fill-21eb0bf3/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)