# Null Coverage Duplicate Key Report and Missing Value Fill

> Null Coverage Duplicate Key Report 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 2026-10-16).

Generates two local analytical reports for null coverage data: a duplicate row_id detection report and an explicit missing-value fill (zero, mean, or median) for up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-03-070?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/null-coverage-duplicate-key-report-and-missing-value-fill-b1ce14b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LDcrONBydKRkDdBuNUz8-

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 null-coverage-duplicate-key-report-and-missing-value-fill-b1ce14b0 -d '<json body>'
```

Example prompt: I have up to 200 rows of null coverage data with row_id, dataset_group, date, missing_values, and total_values — can you run a duplicate key report on them and fill any nulls in the missing_values field using median imputation?

## When to prefer this

Choose this endpoint when you need both duplicate key detection and missing-value imputation together on null coverage data (missing_values/total_values fields) in a single cheap call ($0.01 USDC). Ideal for small-to-medium data quality workflows (up to 200 rows) that don't require live data lookups, ML predictions, or external enrichment — purely local analytical computation.

## Known failure modes

- Exceeding 200 rows causes rejection — keep input under the maxItems limit
- Missing required fields (row_id, date, missing_values, total_values) will cause validation errors
- Invalid date format (not YYYY-MM-DD) will fail schema pattern validation
- Providing an unsupported fill method outside zero/mean/median will be rejected
- Null or missing row_id values will fail minLength:1 validation

## How this service works

Null coverage — Duplicate key report + Explicit missing-value fill: Duplicate key report + Explicit missing-value fill for supplied null coverage records (missing_values, total_values). 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 independent analytical reports: (1) a duplicate key report listing any repeated row_id values in the submitted rows, and (2) an explicit missing-value fill report where nulls in the specified field (missing_values or total_values) are replaced using the chosen method (zero, mean, or median). No external lookups or predictions are performed.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/null-coverage-duplicate-key-report-and-missing-value-fill-b1ce14b0/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)