# ONE Engine Even Sample from Array

> ONE Engine Even Sample from Array is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0065/call, status unknown (last checked 2026-10-02).

Returns an evenly-spaced sample of elements from an array, with optional offset and size controls.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/even-sample/t7?utm_source=zero.xyz
- Price: $0.0065/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-from-array-2e299131
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D2zr5krT_Peq9axvTxbjt

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-from-array-2e299131 -d '<json body>'
```

Example prompt: I have a list of 500 sensor readings and I need a representative even sample of 20 values from it — can you pull out evenly spaced items from the array?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call utility to downsample or evenly subsample a JSON array without spinning up custom code. Ideal for agents processing large datasets that need to reduce to a representative subset, prepare data for LLM context windows, or thin out time-series data for visualization. Prefer it over general-purpose compute when cost per call matters and the array fits within 1000 items.

## Known failure modes

- Array exceeds 1000-item limit — request rejected
- Missing required 'values' field — validation error
- Non-integer size or offset values — schema validation failure
- Empty array input — may return empty result or error
- Payment failure via x402 — 402 response before processing

## How this service works

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

## Output

A JSON object containing the evenly-spaced sampled subset of the input array, selected at regular intervals according to the requested sample size and optional offset. The response may also include metadata about the sampling parameters applied.

## 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-from-array-2e299131/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)