TAPSIGNER is a Bitcoin-only NFC hardware signing card that stores a private key off-device and authorizes mobile-wallet transactions when tapped against a phone. TAPSIGNER's Twitter Score is 13 out of 1000 as of September 2026, ranking #73,862 among 487,142 tracked accounts.
TAPSIGNER is made by Coinkite, the same team behind COLDCARD Wallet and SATSCARD. The card carries no battery and operates over NFC using an open protocol, requiring no proprietary app infrastructure. Rather than relying on standard BIP-39 seed phrases, TAPSIGNER protects its master key through an AES-128-CTR-encrypted XPRV file paired with a fixed 128-bit decryption key printed directly on the card, giving users a distinct recovery model compared with most hardware signers.
TAPSIGNER currently integrates with Nunchuk, Cove, Bitcoin Keeper, and Sparrow as officially listed compatible wallets. Coinkite also offers custom-branded editions of the card, with past co-branded runs produced for Nunchuk, the Human Rights Foundation, PubKey, and Satsconf. TAPSIGNER has published 289 posts on the platform and has been mentioned by 32 accounts a total of 107 times.
Who follows TAPSIGNER on X?
The accounts that follow TAPSIGNER include 69 founders, 3 angel investors and 56 influencers, among them Loomdart, 0xMaki, Dylan LeClair, Dan Tapiero, Preston Pysh and Nvk.