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

sinan-captcha
0.1.20

This version was deleted from PyPI around 2026-04-08. Installing fails with:
$ pip3 install sinan-captcha==0.1.20 ERROR: Could not find a version that satisfies the requirement sinan-captcha==0.1.20
View other deleted versions of sinan-captcha

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/2026-04-07/ \ sinan-captcha==0.1.20
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:
sinan_captcha-0.1.20-py3-none-any.whl (141.2KB)
sinan_captcha-0.1.20.tar.gz (111.0KB)