# Creator Desk Contains-Literal Utility

> Creator Desk Contains-Literal Utility is a paid API for AI agents from creator-desk-x402-isolated.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Checks whether a given value contains a specified literal substring or element, returning a boolean result via x402-paid API.

## Facts

- Endpoint: POST https://creator-desk-x402-isolated.onrender.com/v1/utility/contains-literal?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/creator-desk-contains-literal-utility-47eebc44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2UJ9iGDiLTnLNEFgLTCBB

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 creator-desk-contains-literal-utility-47eebc44 -d '<json body>'
```

Example prompt: Check if the string 'The quick brown fox jumps over the lazy dog' literally contains the word 'fox' — just tell me true or false.

## When to prefer this

Use this endpoint when an agent needs a lightweight, pay-per-call literal substring check without setting up a local string library, or when operating in an x402-compatible autonomous payment pipeline that bills only for actual checks performed.

## Known failure modes

- Missing 'value' field returns validation error
- Malformed request body causes 400-level response
- Payment not fulfilled via x402 protocol returns 402 Payment Required
- Service unavailable on cold Render.com instance causes timeout or 503

## How this service works

Machine-callable x402-paid utilities for autonomous agents.

## Output

Returns a JSON object with a 'result' field indicating whether the literal was found (true/false or equivalent), and an 'operation' field confirming 'contains_literal'.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "value": {},
  "options": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "example",
  "operation": "contains_literal"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/creator-desk-contains-literal-utility-47eebc44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from creator-desk-x402-isolated.onrender.com](https://www.zero.xyz/host/creator-desk-x402-isolated.onrender.com/llms.txt)