# Research Sample Recovery Equal-Width Histogram

> Research Sample Recovery 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 2026-10-17).

Generates a bounded equal-width histogram report for research sample recovery data (input mass vs recovered mass) across up to 200 typed records.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ar-analytics-sample-recovery-histogram?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-sample-recovery-equal-width-histogram-d3d358b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2_fMzqtsiDNGtL-7Pl00P

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-equal-width-histogram-d3d358b9 -d '<json body>'
```

Example prompt: Can you run an equal-width histogram on my research sample recovery data — I have 12 records with specimen names, dates, input_mass_g and recovered_mass_g values — and split the recovered_mass_g field into 8 bins?

## When to prefer this

Choose this endpoint when you need a quick, local descriptive frequency distribution (histogram) of research sample recovery mass data without any enrichment or forecasting. It is purpose-built for laboratory or research contexts where you have typed records with specimen, date, and mass fields. Prefer it over general-purpose statistics APIs when your data fits the sample recovery schema and you need a bounded equal-width histogram specifically.

## Known failure modes

- Fewer than 1 or more than 200 rows submitted — request rejected
- bins value outside 1–30 range — validation error
- Missing required row fields (row_id, date, input_mass_g, recovered_mass_g) — schema validation failure
- Date strings not in YYYY-MM-DD format — pattern validation error
- field value not one of 'input_mass_g' or 'recovered_mass_g' — enum validation error
- All values for selected field are null — histogram cannot be computed
- Payment not included or insufficient — 402 payment required response

## How this service works

Research sample recovery - Equal-width histogram: Equal-width histogram 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 equal-width histogram report.

## Output

A bounded equal-width histogram report showing bin boundaries and record counts (frequencies) for the selected field (input_mass_g or recovered_mass_g) across up to 200 supplied sample recovery records, using the specified number of bins (1–30).

## 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",
     "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-equal-width-histogram-d3d358b9/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)