# 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, $0.01/call, status unknown (last checked 2026-10-02).

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

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/lowercase/t8?utm_source=zero.xyz
- Price: $0.01/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-239e18cc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JPQgSp-2YmzTfWd7BbVMt

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-239e18cc -d '<json body>'
```

Example prompt: Take this block of text and convert it to all lowercase: 'Hello World, This Is A TEST String With Mixed Casing!'

## When to prefer this

Choose this endpoint when you need a cheap, stateless, pay-per-call text lowercasing operation within an autonomous agent workflow on Base using x402 micropayments. Ideal for preprocessing steps in NLP pipelines, search normalization, or deduplication tasks where no local text processing library is available or desired. Best suited for agents that want to offload simple string transformations without managing dependencies.

## Known failure modes

- Text exceeding 50,000 characters may be rejected or truncated
- Empty text input may return an error or empty string
- Payment failure via x402 returns HTTP 402 before processing
- Malformed JSON body returns a 400-level error
- Network timeouts possible for very large text near the character limit

## 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 input text converted entirely to lowercase characters, preserving all other content such as punctuation, spacing, and special characters.

## 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-239e18cc/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)