# Accessibility Review — Adjacent Row Changes + Explicit Missing-Value Fill

> Accessibility Review — Adjacent Row Changes + 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 2026-10-27).

Computes adjacent-row changes and fills missing values (zero/mean/median) for accessibility review records tracking checked and remediated resources, across up to 200 rows in 2 reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-education-19-162?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-review-adjacent-row-changes-explicit-missing-value-fill-2d6c3a14
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Tu1dUZJ6bF8z6ki7PwWie

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-review-adjacent-row-changes-explicit-missing-value-fill-2d6c3a14 -d '<json body>'
```

Example prompt: I have 150 rows of accessibility review data by course group with dates, checked_resources, and remediated_resources (some values are null) — can you run adjacent row change analysis and fill missing checked_resources values using median imputation, and give me both reports?

## When to prefer this

Choose this endpoint when you need both adjacent-row delta computation and missing-value imputation in a single call for accessibility review data (checked_resources, remediated_resources) organized by course group and date. It is purpose-built for education accessibility auditing workflows where you have up to 200 tabular rows, some with nulls, and need two coordinated analytical reports without any external data lookups or AI predictions.

## Known failure modes

- Input array exceeds 200 rows — request rejected
- Invalid date format (not YYYY-MM-DD) — validation error
- Field value outside allowed numeric range (±1,000,000,000,000) — rejected
- Unsupported fill method value — enum validation error
- Empty rows array — minItems constraint violation
- row_id missing or empty — required field error

## How this service works

Accessibility review — Adjacent row changes + Explicit missing-value fill: Adjacent row changes + Explicit missing-value fill for supplied accessibility review records (checked_resources, remediated_resources). 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 analytical reports: (1) adjacent row change deltas for consecutive rows of the specified field, and (2) the same dataset with missing values explicitly filled using the chosen method (zero, mean, or median). No external lookups or predictions are made; all computation is local to the supplied rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/accessibility-review-adjacent-row-changes-explicit-missing-value-fill-2d6c3a14/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)