You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
mem8 was reported malicious
OSV:MAL-2026-5319 - Malicious code in mem8 (PyPI)

mem8
4.0.1

This version was deleted from PyPI around 2026-06-08. Installing fails with:
$ pip3 install mem8==4.0.1 ERROR: Could not find a version that satisfies the requirement mem8==4.0.1
View other deleted versions of mem8

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/2026-06-07/ \ mem8==4.0.1
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:
mem8-4.0.1-py3-none-any.whl (81.1KB)
mem8-4.0.1.tar.gz (1.5MB)