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Dev tools · April 24, 2025

Keycard Shell

Light design, heavy security - an open hardware wallet

Keycard Shell launched on April 24, 2025 with 11 votes, #2,830 of 7,818 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 1 year on.

What it does

Keycard Shell is an open-source crypto hardware wallet, compatible with 10+ major software wallets. It uses smart cards (the same technology as credit cards) as secure key storage and signing device (EAL6+). It also features a duress pin, replaceable battery.

Air-gapped hardware wallet with EAL6+ secure element. Signs Bitcoin & Ethereum transactions via QR code. Works with MetaMask, Rabby, Sparrow, UniSat & 15+ wallets. Fully open-source, modular design.

Sale price €107,56 Regular price €125,21 The air-gapped signer that shows you what you sign. Keys live on cards that will outlive any device. Keys never leave the card. Decrease quantity Increase quantity Add to cart In stock · Delivered in 7 days Free worldwide shipping · 50+ countries 30-day returns 93% on hardware-wallets.net · #1 on Walletbeat Verify your device is genuine at first boot. Cryptographically. A hardware wallet was supposed to make you independent Terms · legacy hardware wallets §1 Trust code you cannot fully audit §2 Install our companion app §3 Keep your keys inside our device §4 Accept the firmware changes we decide Void Shell removes the conditions. Verify…from keycard.tech

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