# Delx Range List

> Delx Range List is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Generates a Python-style integer range list (start, stop, step) and returns the values and count without requiring local computation or loops.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/range-list
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-range-list-9394828c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ejDQuvwF3KQD2N40tgBIe

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-range-list-9394828c -d '<json body>'
```

Example prompt: Generate a range list from 0 to 100 stepping by 5 so I can use the indices for batch processing.

## When to prefer this

Choose this endpoint when an AI agent needs to generate integer index sequences for batching, pagination, or enumeration without executing local Python code or loops. It is ideal in sandboxed or restricted environments where local computation is unavailable, or when you want a declarative, auditable record of the range computation as a bounded JSON result.

## Known failure modes

- Invalid or non-integer input for start, stop, or step returns a validation error
- Step of zero causes a division-by-zero or infinite-range error
- Range that exceeds the bounded maximum count is capped or rejected
- Missing required fields (stop) may return a 400-style error
- Payment not received or insufficient USDC balance results in 402 Payment Required

## How this service works

Generate a Python-style range list. Call when you need index sequences for batching without local loops. Returns values list and count (bounded) 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 a JSON object with a 'values' array containing the computed integers in the range and a 'count' integer representing how many values were produced, bounded to safe limits.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "step": {
   "type": "integer",
   "description": "Input field: step."
  },
  "stop": {
   "type": "integer",
   "description": "Input field: stop."
  },
  "start": {
   "type": "integer",
   "description": "Input field: start."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 4,
  "schema": "delx/util-range-list/v1",
  "values": [
   0,
   1,
   2,
   3
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-range-list-9394828c/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)