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Duo Data Utilities – Unicode Analysis
x402
Duo Data Utilities – Unicode Analysis is a paid API for AI agents from api.duoleads.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02).
Analyses a string at the Unicode level: applies NFC/NFD/NFKC/NFKD normalisation, reports which forms the string is already in, lists scripts present, and flags confusable, homoglyph, invisible, and bidirectional-override characters with per-character detail.
Price / call$0.05
Success—
StatusUnknown
How this service works
Analyse a string at the Unicode level: apply NFC, NFD, NFKC or NFKD, report which forms it is already in, list the scripts present (all Unicode scripts), and flag confusable and homoglyph characters — Cyrillic а in a Latin word, fullwidth or mathematical look-alikes, all-look-alike words — plus zero-width joiners, bidirectional overrides, invisible and blank characters. Returns per-character detail with code points, names and the ASCII character each imitates.
Output
Returns a JSON object with the normalised string, grapheme/code-point/UTF-8 byte/UTF-16 unit counts, a list of scripts present, boolean flags for ASCII-safety and mixed-script, which normalisation forms the input already satisfies, and an array of suspicious characters each containing its code point, Unicode name, and the ASCII character it imitates.
Example use cases
Detect spoofed username at registration
“A new user just signed up with the display name 'Аdmin' — can you check it for confusable or homoglyph characters and tell me whether any characters are Cyrillic or otherwise impersonating ASCII letters?”
Normalise user input before database storage
“Before I store this user-submitted text in the database, normalise it to NFC form and tell me whether it was already NFC-normalised, and how many graphemes and UTF-8 bytes it contains.”
Audit a suspicious URL for Unicode trickery
“This URL looks weird to me: 'https://microsоft.com' — can you run it through full Unicode analysis to find any bidirectional overrides, invisible characters, or zero-width joiners hiding in it?”
Technical details
Endpoint
GEThttps://api.duoleads.com/v1/text/unicode?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect Unicode-based spoofing, homoglyph attacks, or invisible/control characters in user-supplied strings — especially usernames, domain names, URLs, or any text where look-alike characters could be exploited. Prefer it over generic string-processing tools when you need simultaneous normalisation, script enumeration, and confusable-character flagging in a single call.
Side effects
- Missing required 'text' query parameter returns a 400 error
- Text exceeding 1024 characters is rejected
- Invalid 'form' enum value (not nfc/nfd/nfkc/nfkd) returns a 400 error
- Invalid 'detail' enum value returns a 400 error
- Payment not provided or insufficient for the $0.05 USDC x402 charge returns a 402 response
- Network timeout or 5xx on provider side
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"form": "nfd",
"lengths": {
"graphemes": 4,
"utf8_bytes": 6,
"code_points": 5,
"utf16_units": 5
},
"scripts": [
"Latin"
],
"ascii_safe": false,
"normalised": "café",
"suspicious": [],
"mixed_script": false,
"already_normalised": {
"nfc": true,
"nfd": false,
"nfkc": true,
"nfkd": false
}
},
"meta": {
"sources": [
{
"id": "unicode-confusables",
"licence": "Unicode License v3",
"version": "18.0.0",
"published": "2026-08-06",
"attribution": "Unicode confusables.txt (UTS #39), (c) Unicode, Inc."
}
],
"price_usd": "0.05",
"disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
"request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
"computed_at": "2026-09-28T12:00:00.000Z",
"deterministic": true
},
"route": "/v1/text/unicode",
"version": "1.0.0"
}
}Tags
x402
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