# ONE Engine Array Set Pack (Tier 6)

> ONE Engine Array Set Pack (Tier 6) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0035/call, status unknown (last checked 2026-10-02).

Packs and processes two input arrays using a set operation at tier 6, returning a tier-dependent result via pay-per-call x402 on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-set-pack/t6?utm_source=zero.xyz
- Price: $0.0035/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-set-pack-tier-6-a100f44d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yCooX_V22vroERO2_0ezA

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-set-pack-tier-6-a100f44d -d '<json body>'
```

Example prompt: Pack these two arrays together using ONE Engine's array set pack — array A is [1, 2, 3, 4] and array B is [3, 4, 5, 6] — and give me the tier 6 result.

## When to prefer this

Choose this endpoint when you need a low-cost, pay-per-call computation to pack or combine two arrays using a set operation on the x402/Base payment rail. Useful inside autonomous agent pipelines where micropayment-gated utility APIs are preferred over subscription services. Best suited for lightweight, stateless array transformation tasks at tier 6 pricing.

## Known failure modes

- Missing or malformed array inputs (a or b not provided or not arrays) may result in an error response
- Payment failure via x402 protocol will block the call
- Empty arrays may produce minimal or empty output
- Network timeouts on the Cloudflare Worker edge
- Unexpected array element types may cause tier-dependent processing errors

## 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 (6) and a tier-dependent output result representing the packed or processed combination of the two input arrays.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "a": {
   "type": "array"
  },
  "b": {
   "type": "array"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 6,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-set-pack-tier-6-a100f44d/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)