# Archive Retrieval — String Normalisation + Explicit Missing-Value Fill

> Archive Retrieval — String Normalisation + 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 2026-10-25).

Normalises string fields and fills missing values in archive retrieval records (retrieved_pages, attempted_pages) for up to 200 rows, returning two independent analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-web-22-037?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/archive-retrieval-string-normalisation-explicit-missing-value-fill-c633331d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u9-wdk1pOajw4k3UbmCQi

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 archive-retrieval-string-normalisation-explicit-missing-value-fill-c633331d -d '<json body>'
```

Example prompt: Clean my archive retrieval dataset by normalising the string fields and filling missing values in the retrieved_pages column using median imputation — I have about 50 rows with site_group, date, retrieved_pages, and attempted_pages.

## When to prefer this

Choose this endpoint when you have archive retrieval records with dirty string fields and missing numeric values in retrieved_pages or attempted_pages and need both issues resolved in a single lightweight call for up to 200 rows, without any live lookup or external API dependency. Prefer it over generic data-cleaning tools when your data specifically matches the archive retrieval schema (site_group, date, retrieved_pages, attempted_pages).

## Known failure modes

- Rows array empty or exceeds 200 items — validation error
- Invalid date format (not YYYY-MM-DD) — schema validation failure
- Unrecognised method value outside zero/mean/median enum — rejection
- Unrecognised field value outside retrieved_pages/attempted_pages enum — rejection
- Numeric values outside allowed range (±1,000,000,000,000) — validation error
- Missing required fields (row_id, site_group, date) — schema validation failure

## How this service works

Archive retrieval — String normalisation + Explicit missing-value fill: String normalisation + Explicit missing-value fill for supplied archive retrieval records (retrieved_pages, attempted_pages). 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 the submitted archive retrieval rows: one for string normalisation of the categorical/string fields and one for explicit missing-value imputation of the chosen numeric field (retrieved_pages or attempted_pages) using the selected method (zero, mean, or median). Up to 200 rows processed per call.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/archive-retrieval-string-normalisation-explicit-missing-value-fill-c633331d/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)