You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
fiinquantx was reported malicious
OSV:MAL-2025-41674 - Malicious code in fiinquantx (PyPI)

fiinquantx

This package was deleted from PyPI around 2025-04-08. Installing fails with:
$ pip3 install fiinquantx ERROR: Could not find a version that satisfies the requirement fiinquantx (from versions: none) ERROR: No matching distribution found for fiinquantx

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pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-04-07/ \ fiinquantx
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Or, download files manually

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0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.1.5