# ONE Engine Array Stats Pack Tier 9

> ONE Engine Array Stats Pack Tier 9 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Computes a tier-9 statistical summary pack over an input array of numeric values, returning tier-dependent statistical outputs.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-stats-pack/t9?utm_source=zero.xyz
- Price: $0.01/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-9-7aa29408
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tj7Eq7iNlc_q9WnTTmNL0

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-9-7aa29408 -d '<json body>'
```

Example prompt: Can you run the tier-9 array stats pack on this list of numbers for me: [12.4, 7.8, 34.1, 9.0, 22.5, 15.3]?

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01 USDC) statistical summary of a numeric array and want a pay-per-call model with no subscription. It's well-suited for autonomous agents that need on-demand descriptive statistics without maintaining a persistent analytics service. Prefer it for lightweight, one-off computations on numeric arrays where cost efficiency and simplicity matter.

## Known failure modes

- Missing or empty 'values' array returns an error
- Non-numeric values in the array may cause computation errors
- Payment failure via x402 protocol blocks the request
- Malformed JSON input body returns a 400-level error
- Very large arrays may time out on the Workers runtime

## How this service works

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

## Output

A JSON object containing the tier number (9) and a tier-dependent statistical result, which likely includes descriptive statistics such as mean, median, variance, standard deviation, min, max, and other computed metrics for the input array.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 9,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-stats-pack-tier-9-7aa29408/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)