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An ultra-fast, rock-solid PyPI server.

Max sustained install throughput

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Getting started

Run pypiron with uvx to get started quickly:

PYPIRON_ADMIN_PASS="$ADMIN" uvx pypiron serve
# serves http://localhost:8080/simple/ — point uv, pip, or poetry at it

Or with Docker:

docker run -p 8080:8080 -e PYPIRON_ADMIN_PASS="$ADMIN" ghcr.io/blackthorn-interstellar/pypiron:latest

Feature comparison

Feature pypiron bandersnatch pypiserver pypicloud devpi proxpi
Easy setup
Fast
Private packages
PyPI proxy
Sync mirror
Cooldown
Malware blocking
No dependency confusion
Vulnerability audit
Scales, no database
Multi-region failover
Web GUI
Download stats
Storage Disk
AWS S3
GCS
Azure Blob

Full comparison

Security

Gauntlet testing

  • Client compatibility testing: uv, pip, poetry, pdm, pipenv, hatch, flit, twine.
  • Tested against all of PyPI. The parsers process all 17 million files ever uploaded to PyPI and match ground truth on each one.
  • Chaos testing. We kill the server at every step of every write, kill fleet nodes mid-upload, and feed it truncated, corrupted, and hash-mismatched upstream responses. It converges to a consistent, installable state every time (crash sweep, fleet chaos, upstream faults).
  • Exhaustive model checker. A model checker enumerates every interleaving of uploads, rebuilds, crashes, and same-filename collisions within its bounds, running the same decision functions the server ships.
  • Continuous deterministic simulation testing. Deterministic simulation runs a whole multi-node fleet single-threaded on virtual time — on the order of a hundred thousand seeded crash/fault/restart schedules per night, every failure reproducible from an 8-byte seed (the simulator).
  • Fuzzed nightly. Coverage-guided fuzzers hammer the parsers.
  • Security audited by all frontier models — the same models that built it. All issues fixed.

The full gauntlet

Going further

Contributing — Humans Need Not Apply

pypiron was built by AI coding agents from Anthropic, OpenAI, SpaceXAI, and Moonshot — and that's how it stays. All development is done by AI coders, for security and consistency: human-developed code is a security risk, and we don't accept it. Humans are welcome to open issues and contribute documentation.

License

MIT — see LICENSE.

Release files for pypiron 0.0.17

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for pypiron 0.0.17
File Size Uploaded
pypiron-0.0.17.tar.gz 9.3 MB Details

Built distributions (wheels)

Table of built distributions (wheels) for pypiron 0.0.17
File
pypiron-0.0.17-py3-none-win_arm64.whl Python 3 none Windows ARM64 Details
pypiron-0.0.17-py3-none-win_amd64.whl Python 3 none Windows x86-64 Details
pypiron-0.0.17-py3-none-win32.whl Python 3 none Windows x86-32 Details
pypiron-0.0.17-py3-none-musllinux_1_2_x86_64.whl Python 3 none Linux musl 1.2+ x86-64 Details
pypiron-0.0.17-py3-none-musllinux_1_2_i686.whl Python 3 none Linux musl 1.2+ x86-32 Details
pypiron-0.0.17-py3-none-musllinux_1_2_armv7l.whl Python 3 none Linux musl 1.2+ ARMv7l Details
pypiron-0.0.17-py3-none-musllinux_1_2_aarch64.whl Python 3 none Linux musl 1.2+ ARM64 Details
pypiron-0.0.17-py3-none-manylinux_2_31_riscv64.whl Python 3 none Linux glibc 2.31+ RISC-V 64 Details
pypiron-0.0.17-py3-none-manylinux_2_28_ppc64le.whl Python 3 none Linux glibc 2.28+ PowerPC 64-le Details
pypiron-0.0.17-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl Python 3 none Linux glibc 2.17+ x86-64 Details
pypiron-0.0.17-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl Python 3 none Linux glibc 2.17+ IBM System/390x Details
pypiron-0.0.17-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl Python 3 none Linux glibc 2.17+ x86-32 Details
pypiron-0.0.17-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl Python 3 none Linux glibc 2.17+ ARMv7l Details
pypiron-0.0.17-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl Python 3 none Linux glibc 2.17+ ARM64 Details
pypiron-0.0.17-py3-none-macosx_11_0_arm64.whl Python 3 none macOS 11.0+ ARM64 Details
pypiron-0.0.17-py3-none-macosx_10_12_x86_64.whl Python 3 none macOS 10.12+ x86-64 Details

Total release size: 143.5 MB

Release files / pypiron-0.0.17.tar.gz

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Size 9.3 MB
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Release files / pypiron-0.0.17-py3-none-win_arm64.whl

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Release files / pypiron-0.0.17-py3-none-win_amd64.whl

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Size 8.9 MB
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Release files / pypiron-0.0.17-py3-none-win32.whl

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Release files / pypiron-0.0.17-py3-none-musllinux_1_2_x86_64.whl

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Release history Release notifications | RSS feed

This release

0.0.17 This release

17 release files

0.0.7

17 release files

0.0.6

17 release files

0.0.5

17 release files

0.0.4

17 release files

0.0.3

17 release files

0.0.2

17 release files

0.0.1

1 release file

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