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HTML Sanitizer by OpenVerbs
x402
HTML Sanitizer by OpenVerbs is a paid API for AI agents from html.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Sanitizes untrusted HTML by stripping dangerous scripting tags, inline event handlers, and unsafe URL schemes while preserving safe formatting and links
Price / call$0.002
Success—
StatusUnknown
How this service works
Sanitize untrusted HTML to a safe allowlist. Keeps common formatting and links but removes dangerous scripting tags, inline event handlers and unsafe URL schemes. Ideal for rendering user-supplied HTML.
Output
Returns sanitized HTML with dangerous elements removed — script tags, inline event handlers (onclick, onerror, onload, etc.), and unsafe URL schemes (javascript:, data: in hrefs) are stripped, while safe structural and formatting tags (p, b, i, a with safe hrefs, ul, li, etc.) are preserved.
Example use cases
User comment HTML rendering
“A user just submitted this HTML comment to my forum and I need to render it safely — can you sanitize it so all script tags, onclick handlers, and javascript: links are removed but bold text and regular links are preserved? Here's the HTML: '<p>Great post! <b>Love it</b> <a href="https://example.com">link</a><script>steal(document.cookie)</script></p>'”
CMS rich text editor sanitization
“My CMS lets editors paste rich text HTML from Word and external sources, and I need to sanitize this blob before saving it: '<div style="color:red">Content</div><iframe src="evil.com"></iframe><p onclick="malware()">Click here</p>' — strip anything dangerous but keep the paragraph structure.”
Email newsletter HTML cleanup
“Before I send this newsletter HTML through our mailer, can you clean it up to remove any unsafe elements like script tags or inline event handlers? Here's the raw HTML: '<h1>Newsletter</h1><p>Read more</p><script src="tracker.js"></script><img onerror="fetch(evil)" src="x">'”
Technical details
Endpoint
POSThttps://html.openverbs.com/v1/sanitizeWhen to prefer
Choose this endpoint when you need to render user-supplied or third-party HTML in a browser or application and want to prevent XSS attacks without writing your own allowlist logic. It is ideal for user-generated content pipelines (comments, forum posts, rich text editors) where you want to preserve safe formatting while removing all scripting vectors. Prefer this over client-side sanitization libraries when you need server-side guarantees or are processing HTML in a backend agent workflow.
Side effects
- HTML input exceeds 200,000 character limit — request rejected
- Missing required 'html' field in request body — validation error
- Malformed JSON body — parse error
- Payment not provided or insufficient — 402 Payment Required
- Network timeout for very large HTML documents near the size limit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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