> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pyx.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

[pyx](https://app.pyx.dev) is a high-performance, Python-native package registry
from [Astral](https://astral.sh), the creators of
[uv](https://github.com/astral-sh/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](https://github.com/vllm-project/vllm),
   [Flash Attention](https://github.com/Dao-AILab/flash-attention),
   [DeepSpeed](https://github.com/deepspeedai/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](https://github.com/astral-sh/uv), but is also compatible with other
packaging tools, like [pip](https://pip.pypa.io/en/stable/).

Visit the [pyx dashboard](https://app.pyx.dev/) to browse available packages,
manage permissions, provision API keys, and more.