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

synthex
0.2.5

This version was deleted from PyPI around 2025-09-03. Installing fails with:
$ pip3 install synthex==0.2.5 ERROR: Could not find a version that satisfies the requirement synthex==0.2.5
View other deleted versions of synthex

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/2025-09-02/ \ synthex==0.2.5
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:
synthex-0.2.5-py3-none-any.whl (38.2KB)
synthex-0.2.5.tar.gz (34.1KB)