# Delx Is Int String

> Delx Is Int String is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-21).

Checks whether a given string represents a valid signed integer, returning a boolean result.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/is-int-str?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-is-int-string-afbec54b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_47HD1Gd-48Lqk5j5-zboo

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-is-int-string-afbec54b -d '<json body>'
```

Example prompt: Can you check whether the string '-42' is a valid signed integer before I try to parse it?

## When to prefer this

Use this endpoint when you need a lightweight, stateless check to confirm a string is a parseable signed integer before performing actual parsing — especially useful in form validation pipelines, data ingestion guards, or agent workflows that need to branch on numeric type without executing a full parse. Prefer it over regex-based checks in environments where you want a managed, consistent validation rule without writing custom code.

## Known failure modes

- Missing or empty 'text' field returns an error or false result
- Non-string input type may cause a validation error
- Payment failure via x402 if USDC balance is insufficient
- Network timeout producing no response

## How this service works

Check whether a string is a signed integer. Call when you validate numeric form fields before parse. Returns valid boolean 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 boolean indicating whether the provided text string represents a valid signed integer (positive or negative whole number with no decimal point or non-numeric characters).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Input field: text."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "42",
  "valid": true,
  "schema": "delx/util-is-int-str/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-is-int-string-afbec54b/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)