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

iap-messenger
1.1.0rc6

This version was deleted from PyPI around 2025-02-18. Installing fails with:
$ pip3 install iap-messenger==1.1.0rc6 ERROR: Could not find a version that satisfies the requirement iap-messenger==1.1.0rc6
View other deleted versions of iap-messenger

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/2025-02-17/ \ iap-messenger==1.1.0rc6
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:
iap_messenger-1.1.0rc6-py3-none-any.whl (21.1KB)
iap_messenger-1.1.0rc6.tar.gz (18.5KB)