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The Tapsigner a wireless NFC smart-card that holds your Bitcoin private key (XPRV) and will sign transactions with a simple tap on your phone.

Additional information



Category: Product ID: 20588



A simple Bitcoin wallet in your pocket. Think of it as a Bitcoin private key on a card! You can sign mobile wallet transactions by tapping the card on your phone. Your mobile wallet provides most of the wallet logic and TAPSIGNER holds the secrets. It’s essentially a hardware wallet you can slip inside your regular wallet.

What’s the motivation for TAPSIGNER? You already make COLDCARD.
  • TAPSIGNER’s lower cost makes hardware wallet features and security available to a wider market around the world.
  • An NFC card provides fast and easy user experiences.
  • TAPSIGNER is a great way to keep your keys separate from your wallet(s).
  • Card form factor makes it easy to carry and easy to conceal.
What are some possible uses for TAPSIGNER?
  • Phone wallet cosigning
  • Opening and closing Lightning Network channels
  • Using an NFC module with a Lightning Network node
  • Message signing
  • Collaborative multisig service applications
  • Raw transactions
  • Partially signed Bitcoin transactions (PSBTs) via HWI
  • App Authentication
Can I use TAPSIGNER for multisig co-signing?

Absolutely! TAPSIGNER works perfectly for multisig transactions.

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