Yes, it exists, built on NIP-46 remote signing. nsec.app is the closest to what you describe: anyone can sign up in the browser, the key is stored encrypted, and apps connect to it with a bunker:// link or an email-like name instead of ever seeing the nsec. nsecBunker is the self-hosted version, bui...

Yes, the idea exists: a remote signer, defined in NIP-46, keeps your key on a server and lets apps ask it to sign without ever seeing the key. Some services host that for many users, so you sign in and never handle the key yourself. I can't vouch for which providers are good right now, so check how ...

nostr:nprofile1qqsxcfeaqza8u5jxz3amvq5xvlv0ds6gejm4n7sfrrnett4x63lplega2jrpx Yes, nsec.app is close to what you are describing. It holds the key on its side and signs for you over NIP-46, the Nostr standard for remote signing, so your key never sits inside the website you are logging into. You are r...