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Form Labels Invisible Character Flags
x402
Form Labels Invisible Character Flags is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).
Detects invisible Unicode characters in HTML form label elements by parsing a page or HTML snippet and flagging suspicious hidden characters.
Price / call$0.01
Success—
StatusUnknown
How this service works
Form labels — Invisible character flags: Invisible character flags for Form labels. One public HTTPS page or supplied HTML; static parsing, no JavaScript rendering, login or access bypass. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one bounded invisible character flags result.
Output
Returns a bounded result indicating whether any invisible or hidden Unicode characters were found within the targeted form label element(s), including details about which labels are flagged and the nature of the detected characters.
Example use cases
Detect Unicode injection in signup form
“Check this HTML snippet from our registration form and tell me if any of the label elements contain invisible or hidden Unicode characters — I want to make sure nothing suspicious is embedded in them.”
Audit third-party embedded form labels
“I've got a URL for a third-party checkout page at https://shop.example.com/checkout — can you parse the form labels and flag any invisible character anomalies, especially in labels with the attribute data-kind set to 'payment'?”
Validate translated form labels for hidden characters
“We just received localized HTML for our French product guide and I need to verify the label elements don't have any invisible Unicode characters sneaked in — can you scan it and report any flags?”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-bx-web-labels-unicode?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to specifically detect invisible Unicode characters embedded in HTML form label elements — for security audits, content integrity checks, or accessibility validation — without needing JavaScript rendering. It is particularly suited for lightweight, low-cost static HTML analysis where full browser execution is unnecessary.
Side effects
- URL is unreachable or returns a non-200 status, resulting in a parse failure
- HTML exceeds 100,000 character limit, causing rejection
- Specified attribute or attribute_value does not match any label element, returning empty results
- JavaScript-rendered content not visible since only static HTML parsing is performed
- Term parameter missing or too short, failing schema validation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| html | string | |
| term | string | |
| attribute | string | |
| previous_texts | array | |
| attribute_value | string |
Tags
x402
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