# ONE Engine Text Lowercase Converter

> ONE Engine Text Lowercase Converter is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).

Converts a given text string to all lowercase characters via a pay-per-call API endpoint.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v1/text/lowercase?utm_source=zero.xyz
- Price: $0.0009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-text-lowercase-converter-0e35e174
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QBjZWqkY6Hlm6PQWAveHy

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 one-engine-text-lowercase-converter-0e35e174 -d '<json body>'
```

Example prompt: Can you lowercase this text for me: 'Hello World, THIS is a TEST String'?

## When to prefer this

Prefer this endpoint when you need a simple, cheap, reliable, per-call text lowercasing operation within an autonomous agent pipeline that already supports x402 micropayments on Base. It's ideal for lightweight text normalization steps in agent workflows where spinning up a full NLP library would be overkill and cost predictability per call matters.

## Known failure modes

- Missing 'text' field in request body — likely returns a 400 or validation error
- Payment failure or insufficient USDC balance — returns HTTP 402 with payment requirements
- Empty string input may return an empty string output without error
- Non-string value for 'text' field may result in a type error or unexpected behavior
- Network timeout on the Cloudflare Workers edge — transient 5xx error

## How this service works

Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.

## Output

A JSON object containing the field 'text' with the value of the input string converted entirely to lowercase characters. For example, input 'Hello World' returns {"text": "hello world"}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "hello world"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-lowercase-converter-0e35e174/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from one-search.one-engine.workers.dev](https://www.zero.xyz/host/one-search.one-engine.workers.dev/llms.txt)