Coming Soon
Authentication, Unchained
Passwordless login built on Bitcoin. Key-Rex uses the Lightning Network's LNURL-auth protocol to replace passwords with cryptographic proof — no emails, no personal data, just your wallet. Open source. Privacy-first by design. Powered by Bitcoin.
Built on Bitcoin
Leverages the Bitcoin Lightning Network for trustless, decentralized authentication
Lightning Fast
One-tap sign in using any Lightning wallet — Alby, Phoenix, Zeus, and more
No Passwords
Cryptographic signatures replace passwords — nothing to hack or leak
Your Wallet Is Your Identity
Your Bitcoin wallet becomes your universal login — no accounts to create or manage
Two Lines of Code
Drop-in embed script that works on any website with minimal setup
Open Source
Fully transparent MIT-licensed code — verify exactly how it works
Battle-Tested Cryptography
Built on the same ECDSA signatures that secure billions in Bitcoin transactions
Works Alongside Existing Auth
Add Lightning login as an option next to your current sign-in methods
How It Works
Open Wallet
Any Lightning wallet
One Tap
Cryptographic signature
Signed In
No password needed
Be the First to Know
Interested in adding Lightning authentication to your site? Drop us a message and we'll reach out when we launch.