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

vesper-api
0.1.9

This version was deleted from PyPI around 2024-01-23. Installing fails with:
$ pip3 install vesper-api==0.1.9 ERROR: Could not find a version that satisfies the requirement vesper-api==0.1.9
View other deleted versions of vesper-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/2024-01-22/ \ vesper-api==0.1.9
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:
vesper_api-0.1.9-cp38-cp38-manylinux1_x86_64.whl (1.9MB)
vesper_api-0.1.9-cp39-cp39-macosx_10_9_universal2.whl (529.3KB)
vesper_api-0.1.9-cp39-cp39-win_amd64.whl (415.4KB)