# ONE Engine Array Unique Top-10

> ONE Engine Array Unique Top-10 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Returns the top-10 unique values from a JSON array, optionally filtered against a comparison array with offset support.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/unique/t10?utm_source=zero.xyz
- Price: $0.03/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-top-10-c1483337
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dHDaW3bpVG2UuXH45q8rD

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-top-10-c1483337 -d '<json body>'
```

Example prompt: I have this list of 500 product tags and I want to find the top 10 unique values — can you deduplicate it and return just the distinct top items?

## When to prefer this

Use this endpoint when you need a fast, cheap, pay-per-call deduplication and top-N extraction on a JSON array without standing up your own data pipeline. Ideal for autonomous agents processing moderate-sized lists (up to 1000 items) that need unique value extraction in real time, especially when comparing against a second array to filter already-known values.

## Known failure modes

- Array exceeds 1000-item limit — request rejected
- Malformed JSON array input — validation error
- Missing required 'values' field — 400 Bad Request
- Payment not included or insufficient — 402 Payment Required
- Offset out of bounds — empty or partial result set

## How this service works

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

## Output

A JSON object containing the top-10 unique values extracted from the input array, with optional deduplication against a provided comparison array and support for pagination via offset.

## 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-top-10-c1483337/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)