NumoPay: Tap-to-Pay Bitcoin with Calle | SLP728

In this episode, Calle introduces Numopay, an open-source Bitcoin payment terminal that enables tap-to-pay experiences similar to fiat systems. We explore its technical foundations, privacy features, future developments, and the broader ecosystem of Bitcoin payment solutions.
Takeaways:
🔸Numopay's open-source payment terminal
🔸Tap to pay Bitcoin using NFC and QR codes
🔸Privacy features of Cashu’s eCash system
🔸Auto withdrawal to Lightning addresses for security
🔸Future developments including BIP321 and integrations
Timestamps:
(00:00) - Intro
(00:38) - What is Numopay?
(03:29) - Numopay’s UX, tap-to-pay & offline NFC payments
(08:30) - Unified QR codes (BIP 321)
(10:21) - Auto withdrawal to lightning address
(13:51) - Evolution of Bitcoin payment infrastructure
(20:08) - What is the future of Numopay?
(22:47) - The Cashu ecosystem in 2026
(27:34) - Where should people be using Cashu systems today?
(30:48) - Privacy in Bitcoin
(34:34) - Future of Bitcoin development with AI
(42:06) - Closing thoughts
Links:
• x.com/callebtc

• x.com/NumoPayApp

• x.com/NumoPayApp/status/2026334747991916634

Stephan Livera links:
• Follow me on X:@stephanlivera (twitter.com/stephanlivera)

• Subscribe to the podcast (plinkhq.com/i/1415720320)

• Subscribe to Substack (stephanlivera.substack.com)