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

h2lib
0.0.3

This version was deleted from PyPI around 2023-12-20. Installing fails with:
$ pip3 install h2lib==0.0.3 ERROR: Could not find a version that satisfies the requirement h2lib==0.0.3
View other deleted versions of h2lib

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/2023-12-19/ \ h2lib==0.0.3
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Or, download files manually

And install manually via pip:
h2lib-0.0.3-cp38-cp38-win_amd64.whl (1.3MB)
h2lib-0.0.3-cp39-cp39-win_amd64.whl (1.3MB)
h2lib-0.0.3-cp310-cp310-win_amd64.whl (1.3MB)