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

mcp-eregistrations-bpa
0.21.3

This version was deleted from PyPI around 2026-08-29. Installing fails with:
$ pip3 install mcp-eregistrations-bpa==0.21.3 ERROR: Could not find a version that satisfies the requirement mcp-eregistrations-bpa==0.21.3
View other deleted versions of mcp-eregistrations-bpa

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/2026-08-28/ \ mcp-eregistrations-bpa==0.21.3
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Or, download files manually

And install manually via pip:
mcp_eregistrations_bpa-0.21.3-py3-none-any.whl (292.3KB)
mcp_eregistrations_bpa-0.21.3.tar.gz (249.8KB)