Definition
Specter Desktop is an open-source application for managing Bitcoin self-custody, developed under the cryptoadvance umbrella and the Specter project. It provides an interface for coordinating signing devices and watch-only wallets on top of a user's own Bitcoin Core node, with an emphasis on multisignature setups.
What it is for
The software's design assumption is that the user already runs a full node and wants a clean way to build, monitor, and spend from wallets without exposing their data to third-party services. Operators add their signing devices, single hardware wallets or several combined into a multisig quorum, and Specter assembles the wallet, tracks balances by querying the user's own node, and constructs transactions for those devices to sign via PSBT.
Multisig and verification
Multisig (requiring several keys to authorize a spend, such as 2-of-3) reduces single-points-of-failure: losing or compromising one device need not mean losing funds. Because Specter relies on the user's Bitcoin Core instance for chain data rather than an external indexer, address and balance lookups stay private to that node. The broader Specter project has also produced open-source signing-device firmware, though Specter Desktop itself is the coordinator software.
Specter fits the do-it-yourself node stack. See Bitcoin Core for the node it pairs with and Multisignature for the security model it emphasizes.
In Simple Terms
Specter Desktop is an open-source application for managing Bitcoin self-custody, developed under the cryptoadvance umbrella and the Specter project. It provides an interface for coordinating…