# ONE Engine Array Unique

> ONE Engine Array Unique is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Returns the unique (deduplicated) elements from a JSON array, optionally compared against a second array.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/unique/t6?utm_source=zero.xyz
- Price: $0.004/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-unique-55684075
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_owlZCBHFIOKN-HbIR75es

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-unique-55684075 -d '<json body>'
```

Example prompt: Deduplicate this list of values for me — remove any repeated entries and return only the unique ones: ["apple", "banana", "apple", "cherry", "banana", "date"].

## When to prefer this

Choose this endpoint when you need a cheap, fast, pay-per-call deduplication of a JSON array without setting up a dedicated data pipeline or calling a heavier data processing service. Ideal for AI agents performing ad-hoc data cleaning steps mid-workflow, especially when the array is under 1000 items and you want sub-cent pricing via x402 on Base.

## Known failure modes

- Array exceeds 1000-item limit — request rejected
- Malformed JSON array input — validation error returned
- Missing required 'values' field — bad request error
- Network or worker timeout on large arrays
- Payment failure via x402 — 402 response before processing begins

## How this service works

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

## Output

Returns a JSON object containing the deduplicated array of unique values extracted from the input, with duplicates removed. If a comparison array is provided, the result reflects uniqueness relative to that reference set. Supports pagination via size and offset parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "values"
 ],
 "properties": {
  "size": {
   "type": "integer"
  },
  "other": {
   "type": "array",
   "description": "Optional comparison array"
  },
  "offset": {
   "type": "integer"
  },
  "values": {
   "type": "array",
   "description": "JSON array with at most 1000 items"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-unique-55684075/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)