# Coordinate Quality Checks — IQR Outlier Flags + Two-Measure Correlation

> Coordinate Quality Checks — IQR Outlier Flags + 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 2026-10-26).

Runs IQR-based outlier detection and two-measure correlation analysis on coordinate quality check records (checked_points, flagged_points) for up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-weather-23-176?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-26
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coordinate-quality-checks-iqr-outlier-flags-two-measure-correlation-0035e541
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HwARQ7EUx6ZZ8ms9IORD8

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 coordinate-quality-checks-iqr-outlier-flags-two-measure-correlation-0035e541 -d '<json body>'
```

Example prompt: I have coordinate quality check records for several station groups — can you run IQR outlier detection and a two-measure correlation analysis on my checked_points and flagged_points data? I have about 50 rows covering dates from 2026-10-01 through 2026-11-20 across groups A and B.

## When to prefer this

Choose this endpoint when you need fast, offline statistical analysis (IQR outlier detection + correlation) on coordinate quality check records without any live geospatial lookup, prediction, or external data enrichment. It is ideal for QA pipelines processing up to 200 rows of station-level checkpoint data where you want two analytical reports in a single paid call.

## Known failure modes

- Fewer than 1 row submitted — request rejected
- More than 200 rows submitted — exceeds maximum, request rejected
- Missing required fields (row_id, date, checked_points, flagged_points) — validation error
- Invalid date format (not YYYY-MM-DD) — schema validation failure
- All null values in a measure column — correlation or IQR computation may be undefined
- row_id values exceeding 80 characters — schema rejection
- Payment of 0.01 USDC not completed — request blocked by x402 paywall

## How this service works

Coordinate quality checks — IQR outlier flags + Two-measure correlation: IQR outlier flags + Two-measure correlation for supplied coordinate quality checks records (checked_points, flagged_points). 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

Two analytical reports: (1) IQR outlier flags identifying which rows have checked_points or flagged_points values outside the interquartile range, and (2) a two-measure correlation report quantifying the statistical relationship between checked_points and flagged_points across the supplied rows.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coordinate-quality-checks-iqr-outlier-flags-two-measure-correlation-0035e541/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)