# ONE Engine Array Stats Pack (Tier 4)

> ONE Engine Array Stats Pack (Tier 4) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0018/call, status unknown (last checked 2026-10-02).

Computes statistical analysis on an array of numeric values, returning tier-4 level results via a pay-per-call x402 API on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-stats-pack/t4?utm_source=zero.xyz
- Price: $0.0018/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-array-stats-pack-tier-4-92fc2ae0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__RULvRQhUsz_A2edITYbN

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 one-engine-array-stats-pack-tier-4-92fc2ae0 -d '<json body>'
```

Example prompt: Can you run statistical analysis on this array of numbers for me: [12, 45, 7, 89, 34, 56, 23, 78, 11, 99]?

## When to prefer this

Choose this endpoint when you need quick, pay-per-call statistical computation on a numeric array without setting up your own math library or data pipeline. Ideal for autonomous agents that occasionally need descriptive statistics as part of a larger workflow and want to pay only per use at $0.0018 USDC. Best when already operating within an x402/Base payment ecosystem.

## Known failure modes

- Empty or missing 'values' array returns an error or empty result
- Non-numeric values in the array may cause computation errors
- Payment failure via x402 protocol blocks the request
- Malformed JSON input returns a 400-level error
- Very large arrays may hit payload size limits on Cloudflare Workers

## How this service works

Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.

## Output

Returns a JSON object containing tier-4 statistical results for the provided array, which may include measures such as mean, median, variance, standard deviation, percentiles, min, max, and other descriptive statistics depending on the tier output.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "values": {
   "type": "array"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 4,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-stats-pack-tier-4-92fc2ae0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from one-search.one-engine.workers.dev](https://www.zero.xyz/host/one-search.one-engine.workers.dev/llms.txt)