security-txt-policy-server
This package was deleted from PyPI around 2024-08-28. Installing fails with:
$ pip3 install security-txt-policy-server
ERROR: Could not find a version that satisfies the requirement security-txt-policy-server (from versions: none)
ERROR: No matching distribution found for security-txt-policy-server

Install through StableBuild
You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \
-i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-08-27/ \
security-txt-policy-server
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)