tpm is a tiny shell script which is heavily inspired and largely
compatible with pass. Just like pass it uses gpg2 to securely store
your passwords, the major difference between pass and tpm is that the
latter is a lot more minimal. Furthermore, tpm is written entirely
in POSIX shell.

Invoking tpm consists of specifying a command either insert or show
and supplying one entry as a target. If insert is specified as a
command, tpm will create a new entry and prompt for the corresponding
password. If you specify show as a command, tpm will write the password
for the given entry to standard output.
