Babbage

Babbage provides wallet and application tooling on BSV. The application layer has swung between two modes: requesting private keys pushes security onto users, while hosted login hands assets to the platform; identity, payments and storage each build their own stack, and authorisation cannot be reused across apps.

Its BRC-100 interface keeps keys away from apps: an app makes permissioned capability requests to a wallet, and the user approves identity, keys, certificates and transfers item by item. Supporting pieces include baskets that track application state as UTXOs, key-derived identity certificates, overlay services for shared state, content-addressed storage and signed passwordless requests; transactions carry merkle proofs in SPV and BEEF form. In April 2026 the specification received an interoperability alignment pass, and in June the TypeScript SDK and wallet toolbox moved into one monorepo.