# Numeric Precision Comparisons — Equal-Width Histogram + Two-Measure Correlation

> Numeric Precision Comparisons — Equal-Width Histogram + 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 2026-10-15).

Computes an equal-width histogram and a two-measure correlation analysis on supplied source_value vs transformed_value numeric pairs, returning two analytical reports for up to 200 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-20-171?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/numeric-precision-comparisons-equal-width-histogram-two-measure-0157c52a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q8EiRm7E_Hp16yjZrY7Ln

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 numeric-precision-comparisons-equal-width-histogram-two-measure-0157c52a -d '<json body>'
```

Example prompt: Run an equal-width histogram with 10 bins and a two-measure correlation analysis on my source_value vs transformed_value pairs — I have about 50 rows from group-a and group-b dated between 2026-10-01 and 2026-10-31, and I want both reports back in one call.

## When to prefer this

Choose this endpoint when you need fast, offline statistical analysis of paired numeric columns — specifically a distribution histogram plus a correlation coefficient — without any external data lookup or prediction. It is ideal for validating data transformations, auditing ETL outputs, or doing a quick quality check on numeric precision, especially when you have up to 200 pre-assembled rows and need both reports in a single $0.01 call.

## Known failure modes

- More than 200 rows submitted — request rejected or truncated
- Missing required row fields (row_id, source_value, transformed_value) — validation error
- bins parameter outside 1–30 range — rejected
- Non-numeric or null values in source_value/transformed_value may reduce effective sample size
- Invalid date format (not YYYY-MM-DD) — schema validation failure

## How this service works

Numeric precision comparisons — Equal-width histogram + Two-measure correlation: Equal-width histogram + Two-measure correlation for supplied numeric precision comparisons records (source_value, transformed_value). 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 two independent analytical reports: (1) an equal-width histogram showing bin edges and counts for the selected field across up to 200 rows, and (2) a two-measure correlation report quantifying the linear relationship between source_value and transformed_value. No external data is fetched; all computation is performed locally on the supplied rows.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numeric-precision-comparisons-equal-width-histogram-two-measure-0157c52a/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)