# Accessibility Observations — String Normalisation + Secondary-Measure Weighted Mean

> Accessibility Observations — String Normalisation + Secondary-Measure Weighted Mean is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).

Normalises strings and computes a secondary-measure weighted mean over accessibility observation records (checked_elements, flagged_elements) for up to 200 rows across 2 independent reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-web-16-034?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/accessibility-observations-string-normalisation-secondary-measure-6192a1c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MtVI4oI44UtsdFGn9j4Qk

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 accessibility-observations-string-normalisation-secondary-measure-6192a1c9 -d '<json body>'
```

Example prompt: I have accessibility scan records for two site groups over the past week — each row has a date, site_group, checked_elements, and flagged_elements. Can you run string normalisation and compute the secondary-measure weighted mean for the flagged_elements field across all rows?

## When to prefer this

Choose this endpoint when you need offline, local analytical computation combining string normalisation and secondary-measure weighted mean on accessibility observation data (checked_elements, flagged_elements) for up to 200 rows and 2 reports per call, with no need for live lookups, external predictions, or professional assessments. Prefer it for batch accessibility data post-processing tasks where reproducible statistical summaries per site group are required at low cost.

## Known failure modes

- More than 200 rows submitted — request exceeds maxItems limit
- Missing required fields (row_id, date, site_group, checked_elements, flagged_elements) in any row
- Invalid date format (must match YYYY-MM-DD pattern)
- Numeric values outside allowed range (±1,000,000,000,000)
- Invalid field enum value — must be 'checked_elements' or 'flagged_elements'
- Empty rows array — minItems 1 required

## How this service works

Accessibility observations — String normalisation + Secondary-measure weighted mean: String normalisation + Secondary-measure weighted mean for supplied accessibility observations records (checked_elements, flagged_elements). 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 independent analytical reports covering string-normalised versions of the input records and the secondary-measure weighted mean computed over the selected field (checked_elements or flagged_elements) for up to 200 input rows, without any external lookups or live data.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/accessibility-observations-string-normalisation-secondary-measure-6192a1c9/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)