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Homoglyph Check
x402
Homoglyph Check is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-11-01).
Scans text, domains, emails, or usernames for homoglyph substitutions, mixed scripts, and invisible characters that could indicate spoofing or phishing
Price / call$0.003
Success—
StatusUnknown
How this service works
817 pay-per-call APIs for AI agents. Every endpoint is POST /<name> and is payable in USDC over x402 on Base and Solana — no signup, no API key, just pay-per-call. GET https://x402.agentutility.ai/ returns the same catalog as machine-readable JSON.
Output
Returns a JSON object containing: normalized ASCII version of the text, a risk_score (0-100), risk_level (e.g. 'high'), boolean flags for is_suspicious, ascii_only, and has_mixed_scripts, counts of homoglyphs and invisible characters, per-script block counts (e.g. Cyrillic), and detailed homoglyph_findings arrays listing each suspicious character's Unicode codepoint, its position, its Unicode block, and which ASCII character it impersonates.
Example use cases
Phishing domain detection pipeline
“Before I click this link, check if 'paypaI.com' contains any unicode tricks or homoglyph characters that might make it a fake version of paypal.com.”
User registration spoofing prevention
“Someone just tried to register the username 'аdmin' on our platform — can you scan it for homoglyphs or mixed-script characters that might be impersonating our admin account?”
Brand protection email monitoring
“Scan this sender address 'suppоrt@аmazon.com' for any Cyrillic or lookalike characters that could indicate it's a spoofed phishing email rather than a legitimate Amazon address.”
Technical details
Endpoint
POSThttps://x402.agentutility.ai/homoglyph-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically detect unicode-based impersonation attacks in domains, emails, or usernames — particularly homoglyph substitutions (e.g. Cyrillic 'а' for Latin 'a'), mixed-script combinations, and invisible characters. Prefer this over generic text analysis tools when security context demands character-level unicode inspection with structured findings and risk scoring.
Side effects
- Input text exceeds ~10k character limit — truncation or rejection
- Non-UTF-8 encoded input may cause parsing errors
- Empty text field returns validation error
- Legitimate internationalized domain names (IDNs) may produce false positives for non-Latin scripts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "аpple.com",
"ascii_only": false,
"normalized": "apple.com",
"risk_level": "high",
"risk_score": 80,
"text_length": 9,
"block_counts": {
"Cyrillic": 1
},
"is_suspicious": true,
"homoglyph_count": 1,
"invisible_count": 0,
"has_mixed_scripts": true,
"homoglyph_findings": [
{
"char": "а",
"block": "Cyrillic",
"index": 0,
"codepoint": "U+0430",
"impersonates": "a"
}
],
"invisible_findings": []
}
}Tags
x402
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