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Aside Blocks — Invisible Character Flags
x402
Aside Blocks — 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 2026-10-21).
Detects and reports invisible Unicode characters within HTML aside elements on a given webpage or supplied HTML snippet.
Price / call$0.01
Success—
StatusUnknown
How this service works
Aside blocks — Invisible character flags: Invisible character flags for Aside blocks. 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 containing identified invisible Unicode character flags found within aside elements of the parsed page or HTML, including details about their positions and types relative to the specified attribute and term.
Example use cases
Content integrity audit on documentation
“Scan https://docs.mycompany.com/guide for any invisible Unicode characters lurking inside aside blocks — focus on the aside with attribute id equal to 'note-panel' and let me know if anything suspicious shows up.”
Detect hidden characters in pasted HTML
“I have this HTML snippet with an aside element — can you parse it and flag any invisible or zero-width Unicode characters hiding inside? The aside has attribute id set to 'warning-box' and the term to look for is 'warning'.”
Security review of third-party widget HTML
“We received HTML from a third-party vendor and I need to verify the aside blocks don't contain any invisible Unicode flags or hidden characters — the element has data-kind attribute with value 'promo' and the key term is 'offer'.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-bx-web-asides-unicode?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to specifically audit aside/sidebar HTML elements for invisible Unicode characters or steganographic markers using static HTML parsing. It is ideal for content integrity checks, security audits of third-party HTML, or detecting hidden text manipulation in documentation sidebars, without requiring JavaScript execution or login.
Side effects
- URL is inaccessible or returns non-200 response
- HTML exceeds 100,000 character limit
- Attribute name does not match pattern requirements
- Term is empty or exceeds 100 characters
- JavaScript-rendered content not available since only static parsing is performed
- No aside elements found matching the specified attribute/value
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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