# ONE Engine Even Sample (Top 10)

> ONE Engine Even Sample (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 an even-interval sample of up to 10 elements from an input array, with optional offset and comparison array support.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/even-sample/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-even-sample-top-10-da7ce125
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MtQqBiCQffd49BAadGjcf

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-even-sample-top-10-da7ce125 -d '<json body>'
```

Example prompt: Take this array of 500 values and give me an evenly spaced sample of 10 items from it: [1, 4, 9, 16, 25, ...]

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.03 USDC), pay-per-call way to extract an evenly spaced sample of up to 10 elements from an array of up to 1000 items. Ideal for agents that need to downsample large lists for previewing, summarizing, or comparing data without processing every element. Prefer this over manual index arithmetic when you need reproducible, evenly distributed sampling with optional offset control.

## Known failure modes

- Input array exceeds 1000 items — request rejected
- Missing required 'values' field — 400 error
- Payment not included or insufficient USDC — 402 Payment Required
- Malformed JSON body — parsing error
- Offset out of bounds relative to array length — unexpected empty or partial result

## How this service works

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

## Output

A JSON object containing an evenly spaced subset of up to 10 items drawn from the input array, selected at uniform intervals across its length. If an offset is provided, the sampling window is shifted accordingly. An optional comparison array may also influence or contextualize the output.

## 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-even-sample-top-10-da7ce125/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)