# ONE Engine Text Normalize Lowercase

> ONE Engine Text Normalize Lowercase is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0005/call, status unknown (last checked 2026-10-02).

Converts input text to all-lowercase characters via a pay-per-call API using x402 micropayments on Base.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/lowercase/t1?utm_source=zero.xyz
- Price: $0.0005/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-normalize-lowercase-2c652c8f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pEhpr03-IsPBFRwWwl_n_

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-normalize-lowercase-2c652c8f -d '<json body>'
```

Example prompt: Can you lowercase all the text in this string for me: 'Hello World, THIS IS A TEST of Mixed CASE Text!'

## When to prefer this

Choose this endpoint when you need a reliable, cheap, pay-per-call text lowercasing operation within an autonomous agent pipeline that already uses x402 micropayments on Base. It is ideal for agents that need to normalize text casing before comparisons, indexing, or NLP tasks without spinning up a local string library. At $0.0005 USDC per call it is cost-effective for occasional agent-driven text normalization tasks where simplicity and no-setup overhead matter more than batching.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Payment not included or insufficient USDC balance via x402 — 402 Payment Required response
- Empty text field or missing required 'text' property — validation error
- Network timeout on the Cloudflare Worker endpoint
- Non-UTF-8 or malformed text encoding causing processing errors

## How this service works

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

## Output

Returns a JSON object containing the processed text with all alphabetic characters converted to lowercase. The response schema is open (additionalProperties: true), so the lowercased result is included in the returned object alongside any metadata the service provides.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text up to 50000 characters"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-normalize-lowercase-2c652c8f/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)