solo

Connect to device

$ solo ls

$ solo update

$ solo key credential [domain]

$ solo key wink

$ solo key reset

$ solo version

solo command [options]

solo is the command-line management tool for Solo FIDO2 security keys, open-source hardware authenticators used for passwordless login and two-factor authentication. It handles firmware updates, credential management, and device diagnostics.
The tool can list connected Solo devices, update their firmware, generate FIDO2 credentials for specific domains, and test device functionality. The wink command flashes the device LED to help identify a specific key when multiple are connected.
Solo keys are fully open-source (both hardware and firmware), allowing independent security audits. The CLI tool is Python-based and communicates with the key over USB HID.

ls

List devices.

Update firmware.

Key operations.

Show version.

Flash LED.

Reset device.

Manage credentials.

Solo key required. USB connection needed. Python based.

solo is the CLI tool for Solo FIDO2 security keys, providing open-source hardware authentication.

fido2-token(1), ykman(1), gpg(1)