# Research Sample Recovery – Adjacent Row Changes

> Research Sample Recovery – Adjacent Row Changes is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Computes row-over-row changes in input or recovered mass for research sample recovery records, returning a local descriptive analytics report (up to 200 rows).

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-sample-recovery-period-change?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-sample-recovery-adjacent-row-changes-8293199e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LEzIb1W1txT5NbOA6siKr

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 research-sample-recovery-adjacent-row-changes-8293199e -d '<json body>'
```

Example prompt: I have a list of up to 200 research sample recovery records with specimen names, dates, and masses — can you run an adjacent row changes report on the recovered_mass_g field to show how recovery changed between consecutive rows?

## When to prefer this

Choose this endpoint when you have up to 200 sequential research sample recovery records and need a quick, self-contained row-over-row change calculation on mass values — especially when you do not need external enrichment, forecasting, or ranking, just local period-change descriptive analytics for specimen input or recovered mass.

## Known failure modes

- Fewer than 1 row supplied returns an error
- More than 200 rows exceeds the maximum and will be rejected
- Rows with null mass values for the selected field may produce null deltas
- Malformed date strings not matching YYYY-MM-DD pattern will fail schema validation
- Missing required fields (row_id, specimen, date, input_mass_g, recovered_mass_g) cause request rejection

## How this service works

Research sample recovery - Adjacent row changes: Adjacent row changes for Research sample recovery. Up to 200 supplied typed records. Local descriptive analytics; no enrichment or forecast. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded adjacent row changes report.

## Output

A bounded adjacent row changes report containing per-row delta values for the selected mass field (input_mass_g or recovered_mass_g) across up to 200 supplied specimen records, with local descriptive analytics — no external enrichment or forecasting.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-sample-recovery-adjacent-row-changes-8293199e/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)