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

blackswan-api
0.1.0a43

This version was deleted from PyPI around 2024-07-11. Installing fails with:
$ pip3 install blackswan-api==0.1.0a43 ERROR: Could not find a version that satisfies the requirement blackswan-api==0.1.0a43
View other deleted versions of blackswan-api

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/2024-07-10/ \ blackswan-api==0.1.0a43
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Or, download files manually

And install manually via pip:
blackswan_api-0.1.0a43-py3-none-any.whl (73.5KB)
blackswan_api-0.1.0a43.tar.gz (55.8KB)