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

checkontap
0.1a5

This version was deleted from PyPI around 2023-10-30. Installing fails with:
$ pip3 install checkontap==0.1a5 ERROR: Could not find a version that satisfies the requirement checkontap==0.1a5
View other deleted versions of checkontap

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/2023-10-29/ \ checkontap==0.1a5
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Or, download files manually

And install manually via pip:
checkontap-0.1a5-py3-none-any.whl (27.1KB)
checkontap-0.1a5.tar.gz (13.9KB)