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ScanPay Agent Sanitize
x402
ScanPay Agent Sanitize is a paid API for AI agents from scanpay-edge.alextaghiashvili.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-02).
Strips invisible characters and HTML comments from text and returns injection flags and a sanitized string
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic invisible-character and HTML-comment sanitizer with injection flags
Output
Returns a JSON object with: the cleaned text string, original and cleaned character lengths, a breakdown of removed character types (bidi, controls, zero_width, html_comments), an array of injection flags if suspicious patterns were detected, and an estimated token savings count.
Example use cases
Sanitize untrusted user input before LLM prompt
“Before I feed this user-submitted comment to my LLM, can you clean it of all invisible characters, HTML comments, and bidi overrides and tell me if anything suspicious was flagged? Here's the text: '<!-- hidden --> Hello fffworld
test'.”
Detect prompt injection in scraped web content
“I just scraped this webpage snippet and I want to pass it to an AI agent — can you first sanitize it and flag any zero-width or bidirectional injection characters so I know if someone embedded hidden instructions in it?”
Estimate token savings from stripping hidden chars
“Strip all invisible characters and HTML comments from this blob of text and tell me how many tokens I'll save by cleaning it up before sending it to an LLM.”
Technical details
Endpoint
GEThttps://scanpay-edge.alextaghiashvili.workers.dev/api/v1/agent-sanitize?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, lightweight sanitizer focused specifically on invisible Unicode characters (zero-width, bidi overrides, control characters) and HTML comments — especially before passing untrusted text to an LLM or AI agent. It is purpose-built for prompt-injection defense and AI pipeline hygiene, unlike general-purpose HTML sanitizers or DOMPurify which focus on tag-based XSS. Prefer it when you also need explicit injection flags and token-savings estimates as structured output.
Side effects
- Empty or missing 'text' query parameter returns validation error
- Text exceeding 200,000 character limit is rejected
- Network timeout on Cloudflare Workers edge
- Payment failure via x402 protocol results in 402 response before sanitization occurs
- Non-UTF-8 encoded text may cause unexpected behavior
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"flags": [],
"product": "scanpay.agent_sanitize",
"removed": {
"bidi": 0,
"controls": 0,
"zero_width": 1,
"html_comments": 1
},
"clean_len": 11,
"clean_text": "Hello world",
"original_len": 27,
"tokens_saved_est": 4
}
}Tags
x402
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