You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

foundational
0.3.5

This version was deleted from PyPI around 2024-04-04. Installing fails with:
$ pip3 install foundational==0.3.5 ERROR: Could not find a version that satisfies the requirement foundational==0.3.5
View other deleted versions of foundational

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/2024-04-03/ \ foundational==0.3.5
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
foundational-0.3.5-py3-none-any.whl (19.9KB)
foundational-0.3.5.tar.gz (14.3KB)