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

ciris-agent
1.6.3.1

This version was deleted from PyPI around 2026-05-16. Installing fails with:
$ pip3 install ciris-agent==1.6.3.1 ERROR: Could not find a version that satisfies the requirement ciris-agent==1.6.3.1
View other deleted versions of ciris-agent

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/2026-05-15/ \ ciris-agent==1.6.3.1
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:
ciris_agent-1.6.3.1-py3-none-any.whl (37.5MB)