Gatekeep

Gatekeep is a pay-to-reach toll for your inbox, settled on Monad. Strangers lock a small refundable deposit to email you; reply and they get it back automatically, mark it spam and the deposit funds public goods. Your inbox only ever shows messages someone was willing to stand behind. I built it because I constantly miss important emails buried under cold outreach and spam — replying to everyone is impossible, so real messages slip through. Gatekeep flips the economics: sending a message costs nothing today, so everyone does. Here an unknown sender puts money on the line, so only people who mean it get through, and spammers vanish because they never pay. The crypto layer is invisible to the person running it: you sign up with email or Google (Para embedded wallet), claim an address like you@gatekeep…, and manage everything from a clean Gmail-style inbox. Replies auto-refund and spam auto-donates through a server-side relayer, so you never sign a transaction or hold gas. Every deposit sits in an on-chain escrow whose public-goods address is immutable .