Protection that
you control.
Create a site key, embed the widget, verify every submission on your backend.
Welcome back
Separate developer accounts for D&N CAPTCHA.
Install in three steps
① Register your domain.
② Add one script and widget container.
③ Verify the response token from your server.
This version uses a basic arithmetic challenge for integration testing. It is not production-grade bot detection.
Your websites
Add a website
Register the exact hostname where the widget will run. For a subdomain, enter that subdomain.
Quick installation
Select a website below to get its embed code and backend verification instructions.
Open installation guide ↗