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

natural-pdf
25.3.16

This version was deleted from PyPI around 2025-04-03. Installing fails with:
$ pip3 install natural-pdf==25.3.16 ERROR: Could not find a version that satisfies the requirement natural-pdf==25.3.16
View other deleted versions of natural-pdf

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/2025-04-02/ \ natural-pdf==25.3.16
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Or, download files manually

And install manually via pip:
natural_pdf-25.3.16-py3-none-any.whl (213.5KB)
natural_pdf-25.3.16.tar.gz (197.8KB)