# KiHustle Paired T-Test API

> KiHustle Paired T-Test API 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 a paired t-test on two sets of numeric observations (before and after) to determine statistical significance of the difference.

## Facts

- Endpoint: POST https://kihustle.tech/agents/api/v1/t-test-paired
- 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/kihustle-paired-t-test-api-2b2a0633
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J6sDw-0pMcdVXiaLJc51G

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 kihustle-paired-t-test-api-2b2a0633 -d '<json body>'
```

Example prompt: Run a paired t-test on these before scores [12.3, 14.1, 11.8, 13.5] and after scores [15.2, 16.0, 13.9, 15.8] and tell me if the difference is statistically significant.

## When to prefer this

Choose this endpoint when you need a quick, pay-per-use paired t-test computation without setting up a local statistics library. Ideal for agents automating experiment analysis pipelines, comparing repeated measures on the same subjects, or validating before-and-after treatment effects. Prefer this over independent-samples t-test endpoints when your two data arrays represent the same subjects measured twice.

## Known failure modes

- Mismatched array lengths between 'before' and 'after' inputs causing computation failure
- Empty arrays provided for one or both inputs
- Non-numeric values in the numeric arrays causing parse errors
- Arrays with only one element (insufficient degrees of freedom for t-test)
- Network timeout on large datasets
- HTTP 402 payment required if USDC payment header is missing or insufficient

## 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 paired t-test was processed successfully, along with a result field. The response signals computation status (success) and a result field; detailed t-statistic and p-value output may depend on implementation specifics of this endpoint.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "after": {
   "type": "array",
   "items": {
    "type": "number"
   }
  },
  "before": {
   "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/kihustle-paired-t-test-api-2b2a0633/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)