# 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, $0.004/call, status unknown (last checked 2026-10-02).

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

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/uppercase/t6?utm_source=zero.xyz
- Price: $0.004/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-79621e19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UPw1xCkQvsZYmIiI9oVgu

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-79621e19 -d '<json body>'
```

Example prompt: Convert this text to all uppercase: 'hello world, this is a test message for my pipeline.'

## When to prefer this

Choose this endpoint when you need a reliable, low-cost, pay-per-call text uppercasing operation within an autonomous agent pipeline that supports the x402 payment protocol on Base. It is ideal for agents that process arbitrary text strings up to 50,000 characters and need deterministic, side-effect-free case normalization without managing a self-hosted solution.

## Known failure modes

- Text exceeding 50,000 characters may be rejected or truncated
- Missing or empty 'text' field returns a validation error
- Payment failure via x402 (insufficient USDC balance or network issues on Base) blocks the call
- Malformed JSON request body results in a 4xx error
- Cloudflare Worker cold-start or downtime may cause transient 5xx 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 input text transformed to uppercase. The response follows an open schema so the uppercased result string is included in the response body, likely under a key such as 'result' or 'text'.

## 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-79621e19/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)