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

openapi-gen
1.1.15

This version was deleted from PyPI around 2025-04-27. Installing fails with:
$ pip3 install openapi-gen==1.1.15 ERROR: Could not find a version that satisfies the requirement openapi-gen==1.1.15
View other deleted versions of openapi-gen

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/2025-04-26/ \ openapi-gen==1.1.15
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Or, download files manually

And install manually via pip:
openapi_gen-1.1.15-py3-none-any.whl (468.7KB)
openapi-gen-1.1.15.tar.gz (465.8KB)