You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
h99ai was reported malicious
OSV:MAL-2024-10033 - Malicious code in h99ai (PyPI)

h99ai
0.1.0

This version was deleted from PyPI around 2024-07-20. Installing fails with:
$ pip3 install h99ai==0.1.0 ERROR: Could not find a version that satisfies the requirement h99ai==0.1.0
View other deleted versions of h99ai

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/2024-07-19/ \ h99ai==0.1.0
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Or, download files manually

And install manually via pip:
h99ai-0.1.0-py3-none-any.whl (2.2KB)