# Research Sample Recovery Two-Measure Correlation

> Research Sample Recovery Two-Measure Correlation 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 a two-measure correlation (between input_mass_g and recovered_mass_g) over up to 200 research sample recovery records, returning a local descriptive analytics report.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-sample-recovery-correlation?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-two-measure-correlation-27be54d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_woB9RSOdrNOj4Bt8NztWi

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-two-measure-correlation-27be54d1 -d '<json body>'
```

Example prompt: Can you run a two-measure correlation on my research sample recovery data? I have 4 records — row-1 (group-a, 2026-10-01, input 10g, recovered 1g), row-2 (group-b, 2026-10-02, input 20g, recovered 2g), row-3 (group-a, 2026-10-03, input 15g, recovered 3g), row-4 (group-b, 2026-10-04, input 30g, recovered 4g) — and I want to see how input mass relates to recovered mass.

## When to prefer this

Choose this endpoint when you have up to 200 typed research sample recovery records and need a fast, local two-measure correlation between input mass and recovered mass — no external data enrichment, no forecasting required. Ideal for lab QC workflows, yield analysis, and research reporting where a bounded, reproducible descriptive statistic is sufficient and cost must be kept minimal ($0.01 per call).

## Known failure modes

- Fewer than 1 row supplied — validation error
- More than 200 rows supplied — exceeds maxItems limit
- Missing required fields (row_id, date, input_mass_g, or recovered_mass_g) — schema validation failure
- Date field not matching YYYY-MM-DD pattern — rejected
- Both mass fields null for all rows — insufficient numeric data for correlation
- Payment failure or insufficient USDC balance — 402 response

## How this service works

Research sample recovery - Two-measure correlation: Two-measure correlation 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 two-measure correlation report.

## Output

A bounded two-measure correlation report describing the statistical relationship (e.g. correlation coefficient and supporting descriptive statistics) between input_mass_g and recovered_mass_g across the supplied records. No external enrichment or forecasting is included — results are purely local and descriptive.

## 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
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-sample-recovery-two-measure-correlation-27be54d1/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)