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

onnx-checker
0.1.6

This version was deleted from PyPI around 2025-05-08. Installing fails with:
$ pip3 install onnx-checker==0.1.6 ERROR: Could not find a version that satisfies the requirement onnx-checker==0.1.6
View other deleted versions of onnx-checker

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/2025-05-07/ \ onnx-checker==0.1.6
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:
onnx_checker-0.1.6-py3-none-any.whl (13.6KB)
onnx_checker-0.1.6.tar.gz (10.6KB)