# News Archive Completeness — String Normalisation + Equal-Width Histogram

> News Archive Completeness — String Normalisation + Equal-Width Histogram is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Runs string normalisation and equal-width histogram analysis on news archive completeness records (indexed_items vs expected_items) for up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-news-23-031?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/news-archive-completeness-string-normalisation-equal-width-histogram-74ef8553
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MxdoJKrMPPzmZhtjTZ57Q

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 news-archive-completeness-string-normalisation-equal-width-histogram-74ef8553 -d '<json body>'
```

Example prompt: Can you run string normalisation and an equal-width histogram with 10 bins on my news archive completeness data — here are 50 rows with row_id, channel_group, date, indexed_items, and expected_items fields — analyse the indexed_items column?

## When to prefer this

Choose this endpoint when you need both string normalisation and histogram distribution analysis on news archive completeness data in a single call, without requiring external data sources or live lookups. It is ideal for batch quality checks on up to 200 rows of indexed vs expected item counts grouped by channel and date, at very low cost.

## Known failure modes

- Rows array empty or missing required fields (row_id, date, indexed_items, expected_items) returns validation error
- More than 200 rows submitted exceeds limit and is rejected
- Invalid date format (not YYYY-MM-DD) causes schema validation failure
- Bins value outside 1–30 range rejected
- Null numeric values may affect histogram bin computation
- Payment of 0.01 USDC not fulfilled causes 402 response

## How this service works

News archive completeness — String normalisation + Equal-width histogram: String normalisation + Equal-width histogram for supplied news archive completeness records (indexed_items, expected_items). 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 analytical reports: (1) a string normalisation report cleaning and standardising text fields (e.g. channel_group), and (2) an equal-width histogram breaking the chosen numeric field (indexed_items or expected_items) into the specified number of bins with counts per bin — all computed locally without 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",
     "channel_group",
     "date",
     "indexed_items",
     "expected_items"
    ],
    "properties": {
     "date": {
      "type": "string",
      "default": "",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "maxLength": 10
     },
     "row_id": {
      "type": "string",
      "default": "",
      "maxLength": 80,
      "minLength": 1
     },
     "channel_group": {
      "type": "string",
      "default": "",
      "maxLength": 80
     },
     "indexed_items": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     },
     "expected_items": {
      "type": [
       "number",
       "null"
      ],
      "maximum": 1000000000000,
      "minimum": -1000000000000
     }
    },
    "additionalProperties": false
   },
   "default": [
    {
     "date": "2026-10-01",
     "row_id": "row-1",
     "channel_group": "group-a",
     "indexed_items": 10,
     "expected_items": 1
    },
    {
     "date": "2026-10-02",
     "row_id": "row-2",
     "channel_group": "group-b",
     "indexed_items": 20,
     "expected_items": 2
    },
    {
     "date": "2026-10-03",
     "row_id": "row-3",
     "channel_group": "group-a",
     "indexed_items": 15,
     "expected_items": 3
    },
    {
     "date": "2026-10-04",
     "row_id": "row-4",
     "channel_group": "group-b",
     "indexed_items": 30,
     "expected_items": 4
    }
   ],
   "maxItems": 200,
   "minItems": 1
  },
  "field": {
   "enum": [
    "indexed_items",
    "expected_items"
   ],
   "type": "string",
   "default": "indexed_items"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/news-archive-completeness-string-normalisation-equal-width-histogram-74ef8553/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)