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Malicious URL Screen
x402
Malicious URL Screen is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Screens a URL for phishing and malicious content using the URLhaus blocklist snapshot combined with live heuristics including punycode/homograph detection, brand lookalike analysis, URL shape analysis, and optional redirect chain following
Price / call$0.005
Success—
StatusUnknown
Output
Returns a safety verdict for the submitted URL including: whether the URL appears on the URLhaus blocklist snapshot, deterministic heuristic flags for punycode/homograph attacks, brand lookalike patterns, suspicious URL shape signals, and optionally the result of following the redirect chain to detect forwarding to malicious destinations.
Example use cases
Screen suspicious email links
“I just got an email from what looks like my bank asking me to verify my account at this link: http://amaz0n-secure.support/login — can you run it through your phishing check and tell me if it's a brand lookalike, on any blocklist, or doing anything shady with the domain?”
Validate user-submitted URLs
“Users on our platform can submit links to share with others, and I want to screen this one before it goes live: http://xn--pple-43d.com/offers/free-gift — check it for punycode tricks, brand impersonation, blocklist hits, and follow any redirects to see where it actually lands.”
Audit links before newsletter send
“Before we send out this week's marketing newsletter, can you check all the third-party links we're including and flag any that look malicious or suspicious? Start with this one: http://bit.ly/3xSpecialDeal — follow the redirect chain and tell me if the final destination raises any red flags.”
Technical details
Endpoint
POSThttps://x402.professorsausages.com/url-screen/screenWhen to prefer
Choose this endpoint when you need a fast, low-cost phishing and malicious URL check combining blocklist coverage (URLhaus) with deterministic heuristics — especially useful for detecting brand impersonation, punycode/homograph domain tricks, and suspicious URL shapes that pure blocklists miss. Prefer this over a pure blocklist lookup when the URL is newly registered or not yet indexed. Prefer over full threat intelligence platforms when cost and latency matter more than deep behavioral analysis.
Side effects
- URL not provided or malformed input results in validation error
- URLhaus blocklist snapshot may be slightly stale between refresh cycles, missing very recently added entries
- Heuristic brand lookalike detection limited to known major brand patterns
- Redirect chain following only available opt-in and may time out for long chains
- Legitimate internationalized domain names using punycode may produce false positives
Tags
x402
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