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NFKC Casefold Text Normalizer
x402
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 2026-10-02).
Applies Unicode NFKC normalization followed by casefolding to an input text string, with no network or LLM dependencies.
Price / call$0.001
Success—
StatusUnknown
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.
Example use cases
Normalize user input for matching
“I have a user-submitted string 'Ｆull－Ｗidth Ｔext ＡBC' and I need it NFKC-casefolded so I can do a case-insensitive lookup against my database — can you normalize it?”
Deduplicate unicode usernames
“We're getting duplicate accounts because usernames like 'Ａlice' and 'alice' look different but should match — can you NFKC-casefold both strings so I can compare them properly?”
Standardize multilingual search terms
“I have a search query that came in as 'ｃafé ＡUＴＯ' with full-width characters and mixed case — please apply NFKC casefolding so it's normalized before I run it against the index.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/norm-nfkc-casefold?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token. |
Tags
x402
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