# Mann-Whitney U Test Proxy

> Mann-Whitney U Test Proxy is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).

Performs a Mann-Whitney U non-parametric statistical test comparing two independent numeric groups to determine if they come from the same distribution.

## Facts

- Endpoint: POST https://kihustle.tech/nexus/api/v1/mann-whitney-u-proxy?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mann-whitney-u-test-proxy-a61591d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4gXo9JrJx0dP_SWPFbf2p

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 mann-whitney-u-test-proxy-a61591d7 -d '<json body>'
```

Example prompt: Run a Mann-Whitney U test comparing these two groups of measurements — group A is [12, 15, 14, 10, 13] and group B is [20, 22, 19, 25, 21] — and tell me if the difference is statistically significant.

## When to prefer this

Use this endpoint when you need a quick, low-cost non-parametric comparison of two independent numeric groups without assuming normal distribution, and when you are already integrating x402 micropayment-enabled APIs. Prefer this over parametric t-tests when your data violates normality assumptions.

## Known failure modes

- Empty arrays for group_a or group_b cause computation failure
- Non-numeric values in the arrays result in a processing error
- Missing required group fields return a validation error
- Very large arrays may cause timeout or unexpected results
- Ambiguous or minimal response schema means the exact error format is uncertain

## How this service works

Kostenlose Guides, Solo-Playbooks und Artikel zu KI, Automation und Side Hustles — für Menschen, die mit echten Systemen online Einkommen aufbauen wollen. Transparent finanziert über faire Affiliate-Links.

## Output

Returns a JSON object with a 'result' field indicating the outcome of the Mann-Whitney U computation and a 'status' field confirming success. Detailed U-statistic and p-value fields may be included depending on implementation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "group_a": {
   "type": "array",
   "items": {
    "type": "number"
   }
  },
  "group_b": {
   "type": "array",
   "items": {
    "type": "number"
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "processed",
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mann-whitney-u-test-proxy-a61591d7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kihustle.tech](https://www.zero.xyz/host/kihustle.tech/llms.txt)