VaultOS keeps every API key you work with in one encrypted vault on your own Mac. There is no account to make and nothing is uploaded: the vault is a file you own, and the app is the only thing that reads it.
It also gives your coding agents a way in. Enrol an agent, choose the projects and the folders it may touch, and it can write the keys you approved straight into a project without you pasting anything into a chat window. What it wrote comes back as names and counts, never as values.
have an idea for a tool?
If you keep working around a gap, tell us what it is. The tools on this page all started as somebody being mildly annoyed.