# ONE Engine Array Difference (T5)

> ONE Engine Array Difference (T5) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-02).

Computes the difference between two arrays, returning elements present in the input array but not in the comparison array.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/array/difference/t5?utm_source=zero.xyz
- Price: $0.0025/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-difference-t5-8ddca152
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C2_Vp3b2rIkY0u95YtMkw

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-difference-t5-8ddca152 -d '<json body>'
```

Example prompt: I have two lists — [1, 2, 3, 4, 5] and [2, 4] — can you find me all the elements in the first list that are NOT in the second list?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call array difference computation without standing up your own infrastructure. Ideal for autonomous agents on Base that need to compare lists on-demand with minimal overhead and no subscription commitment.

## Known failure modes

- Missing required 'values' field returns a validation error
- Array exceeding 1000 items is rejected
- Payment not fulfilled via x402 results in 402 Payment Required response
- Malformed JSON body returns a 400 error
- Empty or null 'other' array may return the full 'values' array unchanged

## 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 computed difference — an array of elements from the 'values' input that are not present in the 'other' comparison array. Supports optional pagination via size and offset parameters.

## 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-difference-t5-8ddca152/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)