Trezor Agent is a free, open-source tool for people who want SSH and GPG private keys kept on a hardware wallet instead of on their computer. It suits developers, system administrators and anyone who signs Git commits or logs in to remote servers and wants stronger key protection. In practice, that means a stolen laptop does not expose the key itself.
Trezor Agent for Windows is a practical choice if you already own a supported device. The software works with Trezor and Blockstream Jade hardware wallets, and the project's documentation mentions Windows. The code is public on GitHub, and the latest release is libagent 0.16.2. This page covers how the tool works, how to install it safely, and how it compares with other wallet apps.
How Trezor Agent Keeps Keys on the Device
An SSH or GPG agent is a background program that holds key material and answers requests from other tools. Most agents keep those keys in computer memory, which means anyone with access to your running session may be able to use them. Trezor Agent takes a different approach by keeping the private key on the hardware wallet.
When a tool asks for a signature, the agent forwards the request to the connected device. The device shows the request and waits for your approval, usually by pressing a button. The result goes back to the tool, so the login or signature completes without the private key ever leaving the hardware.
The recovery seed phrase is a separate concept. It is the backup that restores the device's wallet if the hardware is lost or broken, and it should be stored offline. Daily use of the agent does not require it. This design protects against malware that reads files on your disk, though it does not protect against a request you approve without checking it.
Who Is Trezor Agent For?
Trezor Agent fits people whose daily work depends on SSH or GPG keys. A common case is a developer who pushes code to a remote Git server over SSH and wants the key protected by a device. Another is a system administrator who logs in to several servers and would rather not keep a private key file on a laptop that travels.
GPG users form a second group. People who sign commits, emails or release files can use a hardware-held key for those signatures. Decryption works the same way, with the device handling the private part. Support for GPG decryption appeared in a later firmware release, so it is worth checking that your device is current.
People who only want to buy, send or track cryptocurrency will find the tool less useful. It has no interface for coin balances or portfolio views. For those tasks, a full wallet app is the better match, and Trezor Agent becomes a helper for technical work rather than a replacement. Choose it when the problem you are solving is authentication or signing, not asset management.
What Hardware-Backed Keys Mean in Practice
A key pair has two halves. The public key can be shared, for example by placing it on a server or publishing it with a signed Git commit. The private key must stay secret, because anyone who has it can impersonate you. A hardware-backed key keeps that private half on a dedicated device.
A passphrase adds a second barrier on some keys, but the encrypted key still lives on your computer. Hardware keys shift the risk: an attacker who copies your files gets nothing usable without the device. They still need physical access or a way to trick you into approving a request.
A practical habit is to give each server or project its own key, so you can revoke one without losing others. Keep a short list of where each public key is used. If a device is lost, remove its public keys from servers first, then restore your wallet from the seed on a new device.
Key features
SSH login with hardware keys
GPG signing and decryption
Segwit transaction features
Supported coins
Trezor Agent is designed for Trezor and Blockstream Jade hardware wallets. Its purpose is SSH and GPG keys rather than coin balances, so the tool does not list cryptocurrencies or networks the way a wallet app does.
How to install Trezor Agent on Windows
- 1
Check your device and platform
Confirm that you have a supported Trezor or Blockstream Jade device and that its firmware is up to date. The project's release notes list the firmware versions that add SSH and GPG features, so note which version your device runs.
- 2
Download from the official source
Download only from the official website or the project's GitHub Releases page at github.com/romanz/trezor-agent. Avoid mirrors, forum links and file-sharing sites, since they can carry modified copies.
- 3
Verify the file
Compare the SHA-256 checksum of the downloaded file with the value published on the release page, or check the signature if one is provided. Do not run a file whose checksum does not match.
- 4
Install the program
Run the installer or install the libagent 0.16.2 package as described in the project's documentation. The docs mention Windows, but treat the setup as something to test on your own machine before relying on it.
-
Connect and test
Plug in the device, confirm the prompts on its screen, and run a simple test such as an SSH login to a non-critical server. Only move to important accounts after the test works as expected.
System requirements
- Windows, listed as a platform in the project's documentation
- A supported hardware wallet: Trezor or Blockstream Jade
How to use Trezor Agent
Trezor Agent runs in the background and answers requests from SSH or GPG tools. Setup is mainly a one-time task, after which your tools talk to the agent instead of reading a key file.
- Connect your Trezor or Blockstream Jade device and unlock it with your PIN.
- Start Trezor Agent from the command line and point it at your connected device.
- Choose or create the identity you want to use for a given server or project.
- Export the public key and add it to the server's authorized keys or to your GPG keyring.
- Point your SSH or GPG client at the agent, so requests are routed to the device.
- Run a test login or a test signature, and confirm each request on the device when prompted.
- Disconnect the device when you are not using it, so it cannot be used by someone at your desk.
Pros & cons
- Free and open source, so the code can be reviewed
- Private keys can stay on a hardware device instead of a disk
- Covers SSH login and GPG signing and decryption
- Written in Python, which makes the code approachable for developers
- Windows support is mentioned in the documentation but needs your own testing
- Works only with the listed devices, Trezor and Blockstream Jade
- Command-line focus makes it less friendly than graphical apps
- Requires buying a hardware wallet to get the full benefit
Is Trezor Agent safe?
Download only from the official website or the GitHub Releases page, and check the latest version on the official website before installing, since releases change. Verify the SHA-256 checksum or signature before running the file. Be wary of copies offered on forums, download aggregators or sites that ask for payment, because the project is free.
Never enter your seed phrase on a third-party website or into any program that asks for it unexpectedly. You should not need to type your seed phrase into a computer for everyday use of the agent. Keep the recovery seed offline, on paper or in a dedicated backup, and keep device firmware updated. The open-source code gives you a way to review what runs on your machine.
- Official source only. Download from github.com/romanz/trezor-agent. Ignore ads and lookalike domains.
- Check the SHA-256. Compare the installer hash with the value the developer publishes before running it.
- Never share your seed phrase. No developer, support agent or website — including CryptApps — will ever ask for it.
Alternatives
Trezor Agent is narrower than most wallet apps. Trezor Suite and Ledger Wallet focus on managing coin balances, sending transactions and viewing account history. BitBoxApp does similar work for BitBox02 devices. Trezor Bridge handles the connection between your browser and Trezor hardware, without SSH or GPG features.
Keystone and SafePal Desktop belong to other hardware and software ecosystems, so they suit different workflows. If your goal is to sign code or log in to servers with hardware-held keys, Trezor Agent is the tool built for that job. If your goal is to manage crypto assets, a wallet app is the better starting point, and you can add Trezor Agent for technical tasks.
Specifications
- Price
- Free
- Type
- Open source
- License
- —
- Latest version
- libagent/0.16.2
- Last update
- 19 Oct 2026
- Windows support
- Unverified (Windows mentioned in docs)
- Source code
- github.com/romanz/trezor-agent
Frequently asked questions
Yes. Trezor Agent is free and open source, so there is no license fee. Download it from the official website or the project's GitHub Releases page to avoid copies with added software. Trezor or Blockstream Jade devices are separate purchases.
The project documentation mentions Windows, so it is a reasonable starting point for Windows users. Because it is a command-line tool, expect more setup work than with a graphical app. Test it with a non-critical server before relying on it for important access.
Trezor Agent works with Trezor and Blockstream Jade devices. It is not a general tool for every hardware brand, so check the device list before buying hardware for this purpose. Keep your firmware current, since features depend on the firmware version.
No. The private key stays on your hardware wallet, and the agent asks the device to sign each request. Your computer sees public keys and signatures, not the private key itself. Keep your recovery seed phrase offline, because it can restore access if the device is lost.
No. Trezor Suite is a wallet interface for managing coins, while Trezor Agent handles SSH login and GPG signing. Many people use a wallet app for crypto tasks and a tool like Trezor Agent for developer work. The two serve different purposes.
An SSH agent holds your authentication key and answers login requests on your behalf, so you do not have to unlock the key each time. Trezor Agent works as an SSH agent but keeps the key on the hardware device. Each server login then requires the device to approve the request.
Yes. The project is open source and hosted on GitHub at github.com/romanz/trezor-agent. Reading the code and the project's activity can help you judge how it is maintained before you install it.
Verdict
Trezor Agent is a focused, free tool for people who want SSH logins and GPG signing backed by a hardware wallet. It is best for developers, system administrators and privacy-minded users who are comfortable with the command line. If you need a graphical wallet for coin balances, look at the wallet apps in this catalog instead. Test the Windows setup with a non-critical server before using it for production access.