# ONE Engine Stable Sort (Top 10) Array Utility

> ONE Engine Stable Sort (Top 10) Array Utility 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).

Sorts a JSON array of up to 1000 items using a stable sort algorithm and returns the top 10 results, with optional comparison array support.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/stable-sort/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-stable-sort-top-10-array-utility-5831ebb0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hPZRi3J2UDVtRJTR5X6eE

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-stable-sort-top-10-array-utility-5831ebb0 -d '<json body>'
```

Example prompt: Sort this list of product scores [88, 45, 92, 67, 100, 55, 73, 91, 60, 84, 77] using a stable sort and give me the top 10 in order.

## When to prefer this

Choose this endpoint when you need a deterministic, stable sort of a JSON array (up to 1000 items) and only want the top 10 results returned, especially in pay-per-call autonomous agent workflows on Base where low cost ($0.03 USDC) matters. Prefer it over general-purpose sorting when you want stable ordering guarantees with optional offset-based pagination and a lightweight utility API.

## Known failure modes

- Array exceeds 1000 items — request rejected
- Missing required 'values' field — validation error
- Payment not fulfilled via x402 — 402 Payment Required response
- Malformed JSON array input — parsing error
- Network timeout on Cloudflare Worker edge

## 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 stably-sorted top 10 elements from the input array, respecting any offset for pagination and optionally compared against a secondary array.

## 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-stable-sort-top-10-array-utility-5831ebb0/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)