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

checkontap
0.1a1

This version was deleted from PyPI around 2023-10-30. Installing fails with:
$ pip3 install checkontap==0.1a1 ERROR: Could not find a version that satisfies the requirement checkontap==0.1a1
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==0.1a1
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Or, download files manually

And install manually via pip:
checkontap-0.1a1-py3-none-any.whl (26.6KB)
checkontap-0.1a1.tar.gz (13.1KB)