mvarcs provides a collection of Root Certificates for validating the trustworthiness of Mark Certificates such as Verified Mark Certificates (VMC) and Common Mark Certificates (CMC) used in BIMI (Brand Indicators for Message Identification).

mvarcs is available on PyPI. Simply install it with pip:

python -m pip install mvarcs

To reference the installed certificate authority (CA) bundle, you can use the built-in function:

import mvarcs
mvarcs.where()
# '/usr/local/lib/python3.13/site-packages/mvarcs/mvarcs/cacerts.pem'

Additionally, you can get the contents directly:

import mvarcs
mvarcs.contents()
# Issuer: ...
# ...
# -----END CERTIFICATE-----

Or from the command line:

python -m mvarcs
# /usr/local/lib/python3.13/site-packages/mvarcs/mvarcs/cacert.pem

python -m mvarcs -c
# Issuer: ...
# ...
# -----END CERTIFICATE-----

See https://github.com/markcerts/mvarcs