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

crawler4j-sdk
2.1.1

This version was deleted from PyPI around 2026-04-15. Installing fails with:
$ pip3 install crawler4j-sdk==2.1.1 ERROR: Could not find a version that satisfies the requirement crawler4j-sdk==2.1.1
View other deleted versions of crawler4j-sdk

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/2026-04-14/ \ crawler4j-sdk==2.1.1
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:
crawler4j_sdk-2.1.1-py3-none-any.whl (21.3KB)
crawler4j_sdk-2.1.1.tar.gz (16.3KB)