# ONE Engine Array Reverse

> ONE Engine Array Reverse is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).

Reverses the order of elements in a JSON array, returning the reversed array and its count.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v1/array/reverse?utm_source=zero.xyz
- Price: $0.0009/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-reverse-7974dbca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DgrjucEwh7gRsL31-izEk

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-reverse-7974dbca -d '<json body>'
```

Example prompt: Reverse this array of values for me: ["c", "b", "a"] — I need the items in the opposite order along with the count.

## When to prefer this

Use this endpoint when an agent needs a simple, cheap, stateless array reversal via a pay-per-call API on Base using x402 micropayments, especially in automated pipelines where no local compute is preferred or the reversal is one step in a larger agentic workflow.

## Known failure modes

- Array exceeds 1000 items — request rejected
- Malformed JSON input — parsing error returned
- Empty array — returns count 0 and empty values array
- Payment not included or insufficient — HTTP 402 returned
- Non-array value passed in 'values' field — type validation error

## How this service works

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

## Output

Returns a JSON object with a 'count' integer indicating the number of elements, and a 'values' array containing the input items in reversed order.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "values": {
   "type": "array",
   "description": "JSON array, maximum 1000 items"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 3,
  "values": [
   "c",
   "b",
   "a"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-array-reverse-7974dbca/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)