Copy freely. Your keys stay quiet.
A clipboard history for your Mac that knows an API key, a token or a password when you copy one. It hushes it from other clipboard apps, wipes it after a minute and keeps it out of your shell history.



The first minute
What happens to an API key from the moment you copy it.
In Terminal, a browser, an editor, anywhere. Tacet sees it's a Stripe secret key and keeps it in your history, dotted out.
The copy is marked with the nspasteboard.org flag, so Raycast, Alfred, Paste, Maccy and Copy 'Em leave it out of their history.
Where you meant to. If that's Slack, Mail or ChatGPT, Tacet asks first.
Gone from the clipboard, but only if it's still there. Anything you copied since is left alone. 30 s, 2 min or never, if you like.

When something is hushed, a small card shows what it was, where you copied it and the countdown. Keep it a little longer, wipe it now, or copy it without the keys.
Clipboard
⌃⌥Vin any app
Type a few letters and press return: the copy lands in the app you were in. Text, links, images and files, with pins for the ones you keep using. Keys show only by name until you ask.
Change the shortcut in Settings. Pasting for you needs Accessibility; without it, picking a copy just copies it.

What it knows
Anything copied from a password manager counts too.
300+
kinds of keys and tokens: 327 patterns from gitleaks and Nosey Parker, plus Tacet's own checks for private keys, JWTs, database URLs with passwords, Authorization headers, .env lines and random-looking tokens.
sk_live_••••••••M3oNghp_••••••••••3fQaAKIA••••••••7QXZeyJ••••••••••dXJlRuns out in 46 minpostgres://app:••••••@db.internal:5432-----BEGIN OPENSSH PRIVATE KEY-----ed25519Authorization: Bearer ••••••••OPENAI_API_KEY=••••••••••••••••••••Copied from 1Password
Hushed copies stay dotted out in your history. A peek, or pasting one again, needs Touch ID or your Mac password.
A JWT shows its issuer, audience, scopes and time left, read on your Mac. A private key shows its type and size.
Overheard
Apps in the background can read the clipboard too. Tacet reads macOS's own clipboard log, on your Mac, and tells you which ones read a secret while it was there.

Change it at Stripe → opens the page where that key is made again. Tacet knows where for 45 services:
Old keys. Tacet keeps a salted fingerprint of each key, never the key, and points out the ones still in use after 30, 90 or 180 days.
Before it goes somewhere
Small guards for the moments keys usually slip out.
Paste your Stripe secret key into Slack?
Everyone in that conversation would see it, and it stays in the chat's history.
⌘V with a hushed key into Slack, Discord, Messages, Mail, ChatGPT, Claude or any app you add asks first. It watches ⌘V only.
You copied
curl https://api.stripe.com/v1/charges -u sk_live_51Hx…M3oN:Copy without keys gives
curl https://api.stripe.com/v1/charges -u <STRIPE_SECRET_KEY>:A log, config or command with a key inside, ready to share in an issue or a chat, with each key swapped for a placeholder.
Terminals
Every command goes into a plain text history file, tokens and all. Tacet keeps new ones out and sweeps out the old ones.
~ % export STRIPE_KEY=sk_live_51Hx…M3oN ~ % git push origin main ~ % history 1 git push origin main ~ %
Each switch adds one marked line to that shell's startup file, with your OK. Switch it off and the line goes. The check runs on your Mac.
A scan reads 27 kinds of history files: the shells, and tools such as Python, IPython, Node, irb, psql, MySQL, SQLite, redis-cli and mongosh. Pick what goes; each file is backed up first, and Undo puts it back.
Shells you haven't installed wait quietly until you do.

No way online
Tacet's own process can't open a network connection. This is everything that can:

Price
Every future update included. Try everything free for 7 days first.
After the trial your history and the picker still work; hushing secrets needs a licence. Licences live at console.papermint.studio. macOS 14 Sonoma or later, Apple silicon and Intel. Notarized by Apple. Bought from Papermint through Dodo Payments; prices may vary by country.
Questions
Free for 7 days, then $9.99 once. macOS 14 or later, Apple silicon and Intel.
DownloadmacOS 14+ · Apple silicon & IntelMore from Papermint