# ONE Engine Unicode NFKC Normalization

> ONE Engine Unicode NFKC Normalization 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).

Normalizes Unicode text using NFKC (Compatibility Decomposition followed by Canonical Composition) normalization form

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-normalize/unicode-nfkc/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-unicode-nfkc-normalization-ca6ecd80
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1IH6P7b1fVy6ys2QVzKcq

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-unicode-nfkc-normalization-ca6ecd80 -d '<json body>'
```

Example prompt: Normalize this text to NFKC unicode form so all compatibility characters are standardized: 'file ＡＢＣ café résumé ½ ℌ'

## When to prefer this

Choose this endpoint when you need deterministic, standards-compliant NFKC Unicode normalization at low cost ($0.004/call) without running a local library. Ideal for agents preprocessing text before NLP, semantic comparison, or database storage where unicode form consistency matters. Prefer over local normalization when operating in a sandboxed environment without Unicode libraries, or when you want a pay-per-use model with no setup.

## Known failure modes

- Text exceeding 50000 characters may be rejected or truncated
- Invalid JSON body returns an error
- Non-string 'text' field causes validation failure
- Payment failure via x402 protocol blocks the call
- Network timeout on the Cloudflare Worker edge node

## 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 NFKC-normalized version of the input text, where compatibility characters (fullwidth letters, ligatures like fi/fl, special fractions, mathematical letters, etc.) are decomposed and then recomposed into their canonical Unicode equivalents.

## 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-unicode-nfkc-normalization-ca6ecd80/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)