# Delx Array Last

> Delx Array Last is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns the last element of an input array along with an empty flag, with no data retention.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/arr-last
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-array-last-4896b19e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LNQu_eEvROT7-TsclTSG_

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 delx-array-last-4896b19e -d '<json body>'
```

Example prompt: I have the array [10, 20, 30, 40, 50] — can you get me the last element from it and let me know if the list was empty?

## When to prefer this

Choose this endpoint when an agent needs to safely retrieve the last element of an array it holds in memory, especially when you also need an explicit empty-array signal without writing conditional logic. Prefer it over manual index arithmetic when operating in a microservice or agentic pipeline context where simplicity, no-retention guarantees, and a predictable cost ($0.001 USDC) matter. Not appropriate for sorting, searching, or multi-element slicing operations.

## Known failure modes

- Empty array input — returns empty flag as true with no value
- Malformed or missing 'items' field — likely returns a validation error
- Non-array type passed as items — may result in a schema error
- Network timeout — transient failure with no side effects
- Payment failure via x402 — call is rejected before processing

## How this service works

Return the last list element. Call when you need tail of an agent-held array safely. Returns value and empty flag for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

## Output

Returns the last element of the provided array (its value) and a boolean empty flag indicating whether the input array was empty. No data is retained after the call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "items": {
   "type": "array",
   "description": "Input field: items."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "empty": false,
  "value": "gamma",
  "schema": "delx/util-arr-last/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-array-last-4896b19e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)