# ONE Engine Array Set Pack T3

> ONE Engine Array Set Pack T3 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0012/call, status unknown (last checked 2026-10-02).

Computes a set operation (pack/intersection/union) on two input arrays and returns a tier-3 processed result.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-set-pack/t3?utm_source=zero.xyz
- Price: $0.0012/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-t3-2043a607
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_42qwVQ6hIApYZ-WOP1pIo

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-t3-2043a607 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call array set-packing computation on Base via x402 with minimal overhead and no subscription requirement. It is best suited for autonomous agents that need on-demand, cost-controlled set operations on two arrays without spinning up local computation.

## 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 (insufficient USDC or x402 issue) results in 402 Payment Required
- Empty arrays may produce an empty or trivial result
- Cloudflare Worker timeout on very large arrays

## How this service works

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

## Output

A JSON object containing 'tier' (set to 3) and 'result' (a tier-dependent packed or combined representation of the two input arrays, such as a union, intersection, or encoded pack structure).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 3,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-set-pack-t3-2043a607/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)