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

unas-api
0.1.8.4

This version was deleted from PyPI around 2025-04-09. Installing fails with:
$ pip3 install unas-api==0.1.8.4 ERROR: Could not find a version that satisfies the requirement unas-api==0.1.8.4

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/2025-04-08/ \ unas-api==0.1.8.4
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Or, download files manually

And install manually via pip: