# 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 2026-09-14).

Performs the Mann-Whitney U statistical test to compare two independent groups for significant differences

## Facts

- Endpoint: POST https://kihustle.tech/agents/api/v1/mann-whitney-u-proxy
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mann-whitney-u-test-proxy-771972ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iWDlYRwcH_jV7bePEqCTU

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-771972ec -d '<json body>'
```

Example prompt: Can you run a Mann-Whitney U test on these two groups for me? Group A is [12, 15, 14, 10, 13] and Group B is [20, 22, 19, 25, 21] — I want to know if there's a statistically significant difference between them.

## When to prefer this

Choose this endpoint when you need a non-parametric statistical comparison of two independent groups and cannot assume normal distribution of the data. It is ideal as an alternative to the independent samples t-test when data is ordinal, skewed, or contains outliers. Prefer this over parametric tests when sample sizes are small or normality is uncertain.

## Known failure modes

- Empty or missing group_a or group_b arrays returns an error
- Non-numeric values in arrays cause processing failure
- Extremely large arrays may time out or return partial results
- Malformed JSON body returns 400-level error
- Payment failure via x402 protocol blocks request execution

## 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 indicating whether the test was processed successfully, along with the computed test result. Typically includes a status field ('success') and a result field with the Mann-Whitney U statistic and associated p-value or significance conclusion for the two input groups.

## 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-771972ec/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)