# ONE Engine T5 Lowercase Text Normalizer

> ONE Engine T5 Lowercase Text Normalizer is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-02).

Converts input text to all lowercase characters using a T5-based normalization pipeline, for up to 50,000 characters per call.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/lowercase/t5?utm_source=zero.xyz
- Price: $0.0025/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-t5-lowercase-text-normalizer-fc1a17a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qJvi7woEPW71k9o9K7KXV

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-t5-lowercase-text-normalizer-fc1a17a0 -d '<json body>'
```

Example prompt: Can you convert this text to all lowercase for me? Here's the input: 'The Quick Brown Fox Jumps Over The Lazy Dog — PLEASE NORMALIZE THIS.'

## When to prefer this

Choose this endpoint when you need a reliable, pay-per-call lowercase normalization step for agent pipelines without standing up your own NLP infrastructure. Ideal for autonomous agents that need deterministic, stateless text case conversion at low cost ($0.0025 USDC per call) with no rate-limit subscriptions. Prefer this over general-purpose LLM calls for lowercasing since it is cheaper, faster, and deterministic.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected or truncated
- Empty text field — may return empty string or validation error
- Non-string input in text field — schema validation error
- Network timeout on Cloudflare Workers edge — transient 5xx error
- Payment failure via x402 — 402 response if USDC balance insufficient

## 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 lowercased version of the submitted text, with all uppercase and mixed-case characters converted to their lowercase equivalents, 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-t5-lowercase-text-normalizer-fc1a17a0/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)