Coinkite Tapsigner - NFC Hardware Wallet

The Tapsigner from Coinkite is the ultra-compact Bitcoin NFC card – a pocket-sized hardware wallet in credit card format that securely stores private keys (XPRV) and signs transactions via NFC tap. Ideal for mobile co-signing: Tap it against your smartphone for PSBTs, multisig, or Lightning channel opening/closing – keys remain offline, and an app (e.g., Nunchuk) handles the logic.

Motivation: Affordable entry into hardware security (vs. COLDCARD), simple UX for everyday use, separate key storage from hot wallets. Apps: Nunchuk (Android/iOS/Desktop), Sparrow – supports Message Signing, Raw-Tx, HWI, App-Auth. No display/screen verification (rely on companion app), PIN-protected, encrypted backup (no seed phrase), 10+ year lifespan, weather resistant (-15 to 50°C).

Perfect for collaborative multisig, daily cold storage, or Lightning nodes.

Buy your Bitcoin Hardware Wallet from Copiaro – the most convenient BTC NFC Card for on-the-go, with Coinkite security (Secure Element). Fast, discreet, and scalable for self-custody: Sign transactions via tap, without cables or a screen – revolutionary for Bitcoin HODLers and multisig teams!