# ONE Engine Array Stats Pack – Tier 5

> ONE Engine Array Stats Pack – Tier 5 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-02).

Computes statistical metrics on an input array of values at Tier 5 output depth, returning tier-dependent analytical results.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-stats-pack/t5?utm_source=zero.xyz
- Price: $0.0025/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-5-a46b03fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BfHHv-7mpxK2LZ4sT9OiK

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-5-a46b03fd -d '<json body>'
```

Example prompt: Can you compute array statistics on this list of values — [12, 45, 7, 89, 23, 56, 34] — and give me the tier 5 breakdown using ONE Engine?

## When to prefer this

Choose this endpoint when you need a low-cost, pay-per-call statistical computation on an array of values without provisioning your own compute infrastructure. It is well-suited for autonomous agents that need on-demand numerical analysis billed per use via USDC on Base using the x402 protocol. Prefer it over general-purpose code execution when you just need fast descriptive statistics and want micro-payment billing semantics.

## Known failure modes

- Empty or missing 'values' array returns an error or empty result
- Non-numeric values in the array may cause computation failure or unexpected output
- Payment failure via x402 results in 402 response blocking access
- Malformed request body returns a 400-level error
- Very large arrays may time out on the Cloudflare Workers runtime

## How this service works

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

## Output

Returns a JSON object with a 'tier' field set to 5 and a 'result' field containing tier-dependent statistical output — likely including measures such as mean, median, variance, standard deviation, min, max, and distribution 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": 5,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-stats-pack-tier-5-a46b03fd/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)