# ONE Engine Array Set Pack (Tier 7)

> ONE Engine Array Set Pack (Tier 7) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Packs and processes two input arrays using a tier-7 set operation, returning a tier-dependent result via pay-per-call x402 micropayment on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-set-pack/t7?utm_source=zero.xyz
- Price: $0.005/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-7-886152b5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Hn8AlkhJrWc8fRZZ-VRit

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-7-886152b5 -d '<json body>'
```

Example prompt: Take these two arrays — [1, 2, 3, 4] and [3, 4, 5, 6] — and run them through the tier-7 array set pack operation to get the combined result.

## When to prefer this

Choose this endpoint when you need a cheap, fast, pay-per-call set operation on two arrays (e.g. union, intersection, packing) at tier 7, especially in autonomous agent workflows where micropayment via x402 on Base is acceptable and you want a serverless utility without maintaining your own set-computation logic.

## Known failure modes

- Missing 'a' or 'b' array fields returns a validation error
- Non-array values for 'a' or 'b' may cause a 400 bad request
- Payment failure via x402 results in a 402 Payment Required response
- Tier-7 specific logic errors may return unexpected result shapes
- Empty arrays may produce empty or trivial results depending on set operation semantics

## How this service works

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

## Output

A JSON object containing a 'tier' field (value 7) and a 'result' field with the tier-dependent packed output of the two input arrays — likely a deduplicated union, intersection, or other set operation result depending on tier logic.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 7,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-set-pack-tier-7-886152b5/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)