Alternatively there's also this with 1.7k stars already and supporting more services (Despite the name): https://github.com/steipete/CodexBar (https://codexbar.app)
btw, I have failed to make the proper use of either of them - claudecodeusage keeps saying that I'm not signed in (I have Claude Desktop and CLI installed and signed in on both). CodexBar keeps saying "Claude usage probe timed out", even though it does show some numbers. I don't have a subscription, I just use the API.
Is it safe ? It needs to reads Keychain. Like the OP app
Good shout. CodexBar covers a lot more ground. This one is intentionally minimal and Claude focused because that is all I personally needed.