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

nmbrs-soap-api
0.0.208

This version was deleted from PyPI around 2024-03-10. Installing fails with:
$ pip3 install nmbrs-soap-api==0.0.208 ERROR: Could not find a version that satisfies the requirement nmbrs-soap-api==0.0.208

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/2024-03-09/ \ nmbrs-soap-api==0.0.208
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Or, download files manually

And install manually via pip: