# ONE Engine Array Stats Pack (Tier 1)

> ONE Engine Array Stats Pack (Tier 1) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0007/call, status unknown (last checked 2026-10-02).

Computes statistical metrics over an array of numeric values, returning tier-dependent summary statistics.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-stats-pack/t1?utm_source=zero.xyz
- Price: $0.0007/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-1-ab4f6a51
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uHkJsuUhvms1Po69_RXZ-

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-1-ab4f6a51 -d '<json body>'
```

Example prompt: Can you run stats on this array of numbers for me: [12, 45, 7, 89, 33, 21, 56, 78, 14, 60]? I need the standard statistical summary — mean, median, min, max, that sort of thing.

## When to prefer this

Choose this endpoint when you need a low-cost, fast, pay-per-call statistical summary of a numeric array and are already using the x402 micropayment protocol on Base. It is ideal for autonomous agents that need on-demand descriptive statistics without hosting their own compute, and when cost per call must remain minimal (sub-cent range).

## Known failure modes

- Empty or missing 'values' array returns an error or empty result
- Non-numeric values in the array may cause computation errors or be ignored
- Payment failure via x402 returns a 402 Payment Required response before processing
- Malformed JSON body results in a 400 Bad Request
- Very large arrays may hit Cloudflare Worker size or timeout limits

## How this service works

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

## Output

A JSON object containing tier-1 statistical output for the input array, including computed metrics such as mean, median, min, max, standard deviation, and/or variance depending on the tier level.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 1,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-stats-pack-tier-1-ab4f6a51/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)