# ONE Engine Array Set Pack (Tier 1)

> ONE Engine Array Set Pack (Tier 1) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0007/call, status unknown (last checked 2026-10-02).

Computes set operations (pack) on two input arrays and returns a tier-dependent result, priced per call via x402 on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/array-set-pack/t1?utm_source=zero.xyz
- Price: $0.0007/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-1-aaecdc0a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QBZoDY3bHNuLjUmcUhrm7

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-1-aaecdc0a -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] — give me the tier-1 packed result.

## When to prefer this

Choose this endpoint when you need a low-cost, pay-per-call set-pack operation on two arrays and are operating within an x402-enabled agent on Base. It is ideal for autonomous agents that need lightweight array set computation without standing up their own infrastructure, and when per-call micropayment billing is preferred over subscription pricing.

## Known failure modes

- Missing or malformed 'a' or 'b' array fields returns an error
- Payment failure via x402 prevents access to the endpoint
- Non-array inputs for 'a' or 'b' may cause a validation error
- Empty arrays may return an empty or trivial result
- Network timeout on the Cloudflare Worker edge node

## 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 (integer, value 1 for this endpoint) and a 'result' field holding the tier-dependent packed set output derived from 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": 1,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-set-pack-tier-1-aaecdc0a/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)