kolomenkin/oathtool repository overview

If you got TOTP key "AB8BSHN827649BDKWI", the following command will print authentication code for current time (valid ~ during the current minute)

docker run --rm --network=none kolomenkin/oathtool:2024-10-30 --totp -b "AB8BSHN827649BDKWI"

The Docker container above does not have access to internet (--network=none). So it is safe to provide your key to container.