Protect the action.
Respect the visitor.
Verification for signups, forms, and other sensitive actions. InstantBlock checks the browser and gives your backend a signed decision it can verify before continuing.
A verification layer that fits your application.
Start a check in the browser. Receive a signed result. Let your server decide whether the action continues.
Check the browser
The visitor starts an action you protect. InstantBlock gathers signals from that session.
Assess the request
The result can accept, ask for a follow-up check, or reject the attempt.
Verify on your server
Your backend checks the signed token and decides what to do with the action.
Use it where abuse costs you.
Choose the moment to run verification. Begin with one action, review the results, and expand protection as you learn from your traffic.
Explore the featuresYour rules.
Your final call.
InstantBlock gives you the evidence and a signed decision. Your application validates the token and controls what happens next. Review recent outcomes in the dashboard and tune each site's settings as traffic changes.
Understand the flowAccept
Continue after your server validates the token.
Challenge
Ask for another check when a session needs more evidence.
Reject
Stop the action when the decision is not accepted.
Start with one protected action.
Create a site, connect the browser check, and review the decisions it produces.