# ty: reference & source

> Fast Rust-based Python type checker and language server with editor integrations. Reference only in Awesome Python Dev; review its source, license and setup.

[HTML page](https://m9rco.github.io/awesome-python-dev/tools/ty/) · [Agent guide](https://m9rco.github.io/awesome-python-dev/agents/index.md) · [Discovery index](https://m9rco.github.io/awesome-python-dev/llms.txt)

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Catalog reviewed: 2026-10-29. [Catalog source](https://github.com/m9rco/awesome-python-dev/blob/239895d3dd1353a48c5b39eee8eb028aadd8ac8f/src/awesome_python_dev/data/catalog.json).

LSP tools / Reference only

## ty

Fast Rust-based Python type checker and language server with editor integrations.

[Upstream project ↗](https://docs.astral.sh/ty/) [View repository ↗](https://github.com/astral-sh/ty) 

### Install with the upstream project

This entry is a reference. It has no `apd init` recipe in this catalog snapshot. Follow the [upstream documentation](https://docs.astral.sh/ty/)  for installation and configuration.

A native language server is not an MCP server. To add an installable LSP bridge to your coding agent, explore [Serena](https://m9rco.github.io/awesome-python-dev/tools/serena/) .

### Integration notes

Standalone LSP reference for the Astral toolchain alongside uv and Ruff; upstream labels it beta. Distributed as a PyPI binary (uvx ty check, ty server) and configured through the editor integration guide. Overlaps pyright on Python typing; configure one type checker per project. Not an MCP server, so no launch recipe is recorded.

### Source & review

- Repository: astral-sh/ty
- License: MIT
- Category: language servers
- Reviewed: 2026-10-28
- GitHub stars at review: 19,973
- Installation: Reference only

Star counts are review snapshots, not live rankings. Upstream licenses apply to each resource.

### Review the source evidence

- [Upstream evidence 1 ↗](https://api.github.com/repos/astral-sh/ty) 
- [Upstream evidence 2 ↗](https://docs.astral.sh/ty/features/language-server/) 
- [Upstream evidence 3 ↗](https://docs.astral.sh/ty/editors/) 
- [Upstream evidence 4 ↗](https://github.com/astral-sh/ty/blob/main/LICENSE)