# Delx Reverse String

> Delx Reverse String is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).

Reverses a string and returns the result as structured JSON, billed per successful call at $0.001 USDC.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/reverse-string?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-reverse-string-180dfc17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_28fpB4nJ4Gt2tgzZKLOuH

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-reverse-string-180dfc17 -d '<json body>'
```

Example prompt: Can you reverse the string 'Hello, World!' for me and return the result?

## When to prefer this

Choose this endpoint when you need a deterministic, on-demand string reversal inside an agent workflow without managing library dependencies, API keys, or subscriptions. Ideal for pay-per-use pipelines where you only want to pay for successful results and need structured JSON output compatible with downstream steps.

## Known failure modes

- Input text exceeds 100,000 character limit — request rejected
- Empty or missing text field — validation error returned
- Payment failure via x402 protocol — call not executed
- Network timeout or service unavailability — no charge incurred

## How this service works

Reverse a string for $0.001 USDC. Use this when an agent needs reverse string inside a workflow without installing a library or managing an API key. Deterministic first-party execution, structured JSON output, no subscription, and payment only for a successful result.

## Output

A JSON object containing the reversed version of the input string, returned only on a successful call (payment is only charged on success).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 100000,
   "description": "Primary text input (max 100k chars). Processed first-party; not retained as a dataset."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "dlrow tnega olleh",
  "schema": "delx/reverse-string/v1",
  "source_len": 17
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-reverse-string-180dfc17/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)