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

atcoder-api
0.1.2

This version was deleted from PyPI around 2025-06-20. Installing fails with:
$ pip3 install atcoder-api==0.1.2 ERROR: Could not find a version that satisfies the requirement atcoder-api==0.1.2
View other deleted versions of atcoder-api

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/2025-06-19/ \ atcoder-api==0.1.2
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:
atcoder_api-0.1.2-py3-none-any.whl (19.3KB)
atcoder-api-0.1.2.tar.gz (9.7KB)