Block spam without annoying your users.
Sentinel is an AI-powered widget that classifies form submissions in real time. Drop in one script tag — no CAPTCHA, no redesigns, no hit to your conversion rate.
One script tag. Two minutes.
Add this to the page with your form. Sentinel finds the form, injects a honeypot, watches the submission, and passes a signed verdict token to your backend on submit.
Your server calls /api/verify with the token and your secret key to get back a human/bot decision and reason codes.
<script src="https://your-domain.com/widget.js"
data-site-key="sk_your_public_key"
async></script>What you get
Invisible to users
No CAPTCHA, no checkboxes, no friction. A honeypot field plus behavioral signals do the work in the background — form conversion stays intact.
Layered detection
Fast heuristics (honeypot, timing, spam patterns) catch the obvious bots. Borderline cases escalate to an AI classifier for nuanced judgment.
Fail open, fail fast
Sub-200ms round-trip under load. If Sentinel is unreachable, your form still submits — we never block real users.
Train with one click
Mark a submission as human or spam from the dashboard. The ground truth loop sharpens detection for your specific traffic.
Ready to silence the spam?
Create a free site key, paste the snippet, and you're protected in minutes.