# Vendor Evaluation — Equal-Width Histogram + IQR Outlier Flags

> Vendor Evaluation — Equal-Width Histogram + IQR Outlier Flags is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Computes an equal-width histogram and IQR-based outlier flags on vendor evaluation score data (supplied_score or maximum_score) for up to 200 rows, returning two analytical reports.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-ib26-company-10-170?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vendor-evaluation-equal-width-histogram-iqr-outlier-flags-4e8ec62d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RGJhLvlA_fAgfrv2Y-yBs

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 vendor-evaluation-equal-width-histogram-iqr-outlier-flags-4e8ec62d -d '<json body>'
```

Example prompt: I have 150 vendor evaluation records with supplied_score and maximum_score columns — can you run a histogram with 10 bins on the supplied_score field and flag any IQR outliers across all rows?

## When to prefer this

Choose this endpoint when you need fast, offline statistical profiling of vendor or supplier evaluation records — specifically equal-width histogram distribution and IQR-based outlier detection in a single call. Ideal for procurement teams, data auditors, or analysts who already have up to 200 rows of scored vendor data and need both distribution shape and anomaly flags without sending data to external prediction or lookup services.

## Known failure modes

- More than 200 rows submitted — request rejected due to maxItems constraint
- Invalid date format (not YYYY-MM-DD) causes row validation failure
- bins value outside 1–30 range returns validation error
- Missing required fields (row_id, supplied_score, maximum_score) causes schema rejection
- Null values in the selected score field may affect IQR computation or be excluded
- Payment failure (insufficient USDC balance) blocks API execution

## How this service works

Vendor evaluation — Equal-width histogram + IQR outlier flags: Equal-width histogram + IQR outlier flags for supplied vendor evaluation records (supplied_score, maximum_score). 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 per call: (1) an equal-width histogram showing how vendor scores are distributed across the specified number of bins, and (2) an IQR outlier flag report identifying which row IDs have scores that fall outside the interquartile range. Both reports are computed locally on the submitted data with no external lookups.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vendor-evaluation-equal-width-histogram-iqr-outlier-flags-4e8ec62d/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)