# NFC Unicode Normalization API

> NFC Unicode Normalization API is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-29).

Normalizes input text to Unicode NFC (Canonical Decomposition followed by Canonical Composition) form without any network calls or LLM involvement

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/norm-nfc?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nfc-unicode-normalization-api-29cbf78a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W6JrDmMDS2jiBXT3c7ywc

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 nfc-unicode-normalization-api-29cbf78a -d '<json body>'
```

Example prompt: Normalize this text to NFC Unicode form: 'café résumé naïve' — I need the canonically composed version with no decomposed characters.

## When to prefer this

Prefer this endpoint when you need a deterministic, pure-compute NFC Unicode normalization with no external network calls or LLM overhead, and when the $0.008 USDC flat fee is acceptable. Use the free sandbox endpoint (POST /v1/sandbox/norm-nfc) first if available. Choose this over general-purpose text cleaning services when you specifically need Unicode NFC form for internationalization, string comparison, or data storage consistency.

## Known failure modes

- Empty or missing text field returns a validation error
- Text exceeding 100,000 characters is rejected
- Malformed JSON body returns a 400 error
- Payment not included or insufficient USDC results in a 402 Payment Required response

## How this service works

Call when an agent needs text normalized with nfc. No network and no LLM. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/norm-nfc first.

## Output

Returns the input text transformed into Unicode NFC (Canonical Decomposition, followed by Canonical Composition) normal form. Composed characters replace any equivalent decomposed sequences, yielding a standardized, canonical Unicode string.

## 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/nfc-unicode-normalization-api-29cbf78a/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)