# NFKD Text Normalization

> NFKD Text Normalization is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Normalizes input text using Unicode NFKD (Compatibility Decomposition) normalization form

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/norm-nfkd?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nfkd-text-normalization-bfc901ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u2pX5-GOUo8KJjHvVIRDd

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 nfkd-text-normalization-bfc901ae -d '<json body>'
```

Example prompt: Normalize this text to NFKD unicode form: 'Ｈello Wörld fi ½'

## When to prefer this

Choose this endpoint when you need a deterministic, fast, server-side NFKD unicode normalization without any LLM overhead or network lookups. Prefer the free sandbox POST /v1/sandbox/norm-nfkd first if available; use this paid endpoint when the sandbox is unavailable or rate-limited. Ideal for preprocessing pipelines that require consistent unicode normalization at scale.

## Known failure modes

- Empty or missing text field returns validation error
- Text exceeding 100,000 characters is rejected
- Payment of exactly $0.001 USDC not provided results in 402 Payment Required
- Malformed JSON body returns 400 Bad Request

## How this service works

Call when an agent needs text normalized with nfkd. No network and no LLM. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/norm-nfkd first.

## Output

Returns the input text after applying Unicode NFKD (Compatibility Decomposition) normalization, which decomposes characters into their base components and compatibility equivalents without any network calls or LLM involvement.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "examples": [
    "Hello, World!"
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nfkd-text-normalization-bfc901ae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)