# ONE Engine Text Normalize Uppercase

> ONE Engine Text Normalize Uppercase is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0007/call, status unknown (last checked 2026-10-02).

Converts input text to UPPERCASE using a pay-per-call utility API on Base via x402 micropayments.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/uppercase/t2?utm_source=zero.xyz
- Price: $0.0007/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-uppercase-3833878e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BC4RBBWhld6yXM-2V2kFY

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-uppercase-3833878e -d '<json body>'
```

Example prompt: Can you convert this text to all uppercase: 'the quick brown fox jumps over the lazy dog'?

## When to prefer this

Prefer this endpoint when you need a simple, low-cost, pay-per-call uppercase conversion without setting up your own infrastructure, particularly in autonomous agent pipelines on Base using x402 micropayments. Good for one-off or low-volume transformations where spinning up a local string library is impractical or when operating in a composable on-chain agent workflow.

## Known failure modes

- Text exceeds 50,000 character limit — request rejected
- Payment failure via x402/Base — 402 response returned, no transformation performed
- Empty text field — may return error or empty result
- Malformed JSON body — 400 bad request
- Network/worker timeout — transient failure requiring retry

## How this service works

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

## Output

A JSON object containing the uppercased version of the input text, with all alphabetic characters converted to their capital equivalents and non-alphabetic characters preserved.

## 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-uppercase-3833878e/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)