# Join Coverage Duplicate Key Report and Missing Value Fill

> Join 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 2026-10-19).

Analyzes join coverage records to identify duplicate keys and fill missing values in matched_rows or source_rows fields using zero, mean, or median imputation.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-09-070?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/join-coverage-duplicate-key-report-and-missing-value-fill-2780ccab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Th67qZvZXDtD6Cc4qO4oi

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 join-coverage-duplicate-key-report-and-missing-value-fill-2780ccab -d '<json body>'
```

Example prompt: Check my join coverage data for duplicate row IDs and fill any missing matched_rows values using median — here are my rows: row-1/2026-10-01/group-a with matched_rows=10 and source_rows=1, row-2/2026-10-02/group-b with matched_rows=null and source_rows=2, up to about 50 rows total.

## When to prefer this

Choose this endpoint when you need a combined duplicate-key detection and missing-value imputation pass over join coverage data (matched_rows, source_rows) in a single cheap call. Best suited for small-to-medium datasets up to 200 rows where both data quality reports are needed simultaneously. Prefer this over general-purpose analytics when your data specifically follows the join coverage schema with dataset_group and date dimensions.

## Known failure modes

- Exceeds 200 row limit — request rejected or truncated
- Invalid date format not matching YYYY-MM-DD pattern — validation error
- missing required fields (row_id, dataset_group, date) — schema validation failure
- numeric values outside allowed range (-1T to 1T) — rejection
- empty rows array — schema minItems violation

## How this service works

Join coverage — Duplicate key report + Explicit missing-value fill: Duplicate key report + Explicit missing-value fill for supplied join coverage records (matched_rows, source_rows). 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 reports: (1) a duplicate key report identifying any row_id values that appear more than once across the submitted records, and (2) a missing value fill report showing the original and imputed values for the target field (matched_rows or source_rows) using the chosen method (zero, mean, or median). Both reports are computed locally against the supplied data with no external lookups.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/join-coverage-duplicate-key-report-and-missing-value-fill-2780ccab/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)