# NFKC Casefold Text Normalizer

> NFKC Casefold Text Normalizer is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-29).

Applies Unicode NFKC normalization followed by casefolding to an input text string, with no network or LLM dependencies.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/norm-nfkc-casefold?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nfkc-casefold-text-normalizer-e8c40d91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F-HUAH_Fke4I_WyDvrsUw

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 nfkc-casefold-text-normalizer-e8c40d91 -d '<json body>'
```

Example prompt: Can you NFKC-casefold normalize this text for me: 'Ａｅsthetic Ñoño ＴＥＸＴ'? I need it standardized for case-insensitive comparison.

## When to prefer this

Choose this endpoint when you need deterministic, offline Unicode NFKC casefolding with no LLM or external network calls — ideal for text normalization pipelines, case-insensitive string comparison, and deduplication tasks where consistency and speed matter over semantic transformation.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- Text exceeding 100,000 characters is rejected
- Malformed JSON body causes a 400 error
- Payment not included or incorrect amount causes 402 Payment Required

## How this service works

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

## Output

Returns the input text after applying Unicode NFKC normalization (compatibility decomposition followed by canonical composition) and casefolding (locale-independent lowercasing and equivalence mapping), producing a standardized, lowercase string suitable for case-insensitive comparison.

## 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/nfkc-casefold-text-normalizer-e8c40d91/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)