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

mtpylib
0.0.28

This version was deleted from PyPI around 2025-01-25. Installing fails with:
$ pip3 install mtpylib==0.0.28 ERROR: Could not find a version that satisfies the requirement mtpylib==0.0.28
View other deleted versions of mtpylib

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/2025-01-24/ \ mtpylib==0.0.28
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Or, download files manually

And install manually via pip:
mtpylib-0.0.28-py3-none-any.whl (113.9KB)
mtpylib-0.0.28-py3.9.egg (134.5KB)