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

cloudpss-hydrogen

This package was deleted from PyPI around 2026-04-07. Installing fails with:
$ pip3 install cloudpss-hydrogen ERROR: Could not find a version that satisfies the requirement cloudpss-hydrogen (from versions: none) ERROR: No matching distribution found for cloudpss-hydrogen

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/2026-04-06/ \ cloudpss-hydrogen
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Or, download files manually

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4.0.0a1
4.0.0a2
4.0.0a3
4.0.0a4
4.0.0a5
4.0.0a6
4.0.0a7
4.0.0a8
4.0.0a9
4.0.0a10
4.0.0a11
4.0.0a12
4.0.0a13
4.0.0a14
4.0.0a15
4.0.0a16
4.0.0a17
4.5.0