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

qcradle
0.3.1

This version was deleted from PyPI around 2025-07-18. Installing fails with:
$ pip3 install qcradle==0.3.1 ERROR: Could not find a version that satisfies the requirement qcradle==0.3.1
View other deleted versions of qcradle

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/2025-07-17/ \ qcradle==0.3.1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
qcradle-0.3.1-py3-none-any.whl (7.9KB)
qcradle-0.3.1.tar.gz (722.6KB)