# Numeric Precision Comparisons — Two-Measure Correlation + Missing-Value Fill

> Numeric Precision Comparisons — Two-Measure Correlation + 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 2026-10-15).

Computes correlation between source and transformed numeric values and fills missing values using a chosen imputation method, across up to 200 rows of supplied data.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-analytics-20-184?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-two-measure-correlation-missing-value-230da269
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3mapOSdFCexKLvQ9aq9rL

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-two-measure-correlation-missing-value-230da269 -d '<json body>'
```

Example prompt: I have up to 200 rows of numeric data with source_value and transformed_value columns — some values are missing. Can you run a correlation analysis between those two measures and fill any nulls in source_value using the median, grouped by dataset_group and date?

## When to prefer this

Choose this endpoint when you have a batch of up to 200 rows with paired numeric columns (source and transformed) and need both a correlation analysis and a missing-value imputation report in a single call. It is ideal for data quality checks after ETL transformations, pre-modeling data preparation, or reconciliation audits where null handling and linear relationship strength must be assessed together without external data lookups.

## Known failure modes

- Fewer than 1 row or more than 200 rows submitted — rejected by schema
- Invalid date format (not YYYY-MM-DD) causes validation error
- source_value or transformed_value outside ±1,000,000,000,000 range causes rejection
- Invalid imputation method (not zero/mean/median) causes enum validation error
- All values in the target field are null — mean/median imputation may be undefined
- row_id missing or empty string — required field validation failure

## How this service works

Numeric precision comparisons — Two-measure correlation + Explicit missing-value fill: Two-measure correlation + Explicit missing-value fill 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 analytical reports: (1) a correlation report showing the statistical relationship between source_value and transformed_value across the provided rows, and (2) a missing-value fill report showing which entries were imputed and their replacement values, using the selected method (zero, mean, or median) on the specified field.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "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"
  },
  "method": {
   "enum": [
    "zero",
    "mean",
    "median"
   ],
   "type": "string",
   "default": "median"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/numeric-precision-comparisons-two-measure-correlation-missing-value-230da269/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)