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pyx is a high-performance, Python-native package registry from Astral, the creators of uv. With pyx, our goal is to dramatically expand the scope of problems we can solve by extending beyond the uv client to a vertically-integrated packaging server. At present, pyx includes:
  1. Private package hosting and distribution. An extremely fast package index, with hassle-free authentication in the uv client.
  2. PyPI and PyTorch mirrors, with optimized builds and metadata APIs to make resolution and installation much faster.
  3. Access to curated, GPU-enabled package indexes. Point uv to pyx and get access to pre-built wheels for vLLM, Flash Attention, DeepSpeed, and more, all with consistent metadata, and all built against consistent versions of PyTorch and CUDA.
  4. A state-of-the-art query language. Create customized index URLs to filter PyPI and other package sources by package name, version, popularity, age, vulnerabilities, and more. Encode your own compliance rules and ensure reproducible builds.
  5. Support for modern Python packaging standards, including trusted publishing, attestations, project status markers, and more. By focusing exclusively on Python, pyx delivers best-in-class support for cutting-edge standards.
With pyx, Python packaging should be simpler, faster, and more secure, whether you’re publishing your own private packages or installing from public indexes like PyPI. pyx is typically leveraged as a backend to uv, but is also compatible with other packaging tools, like pip. Visit the pyx dashboard to browse available packages, manage permissions, provision API keys, and more.