Astral

Astral (Astral Software Inc.) builds high-performance developer tools for the Python ecosystem, written in Rust. Its products are uv, an extremely fast Python package and project manager that replaces pip, pip-tools, pipx, poetry, pyenv, twine, and virtualenv; Ruff, an extremely fast Python linter and code formatter; and ty, a fast Python type checker and language server. Founded by Charlie Marsh (creator of Ruff) and backed by Accel, Caffeinated Capital, and angel investor Guillermo Rauch, Astral ships open-source command-line tooling distributed via PyPI, crates.io, npm, and Homebrew. In March 2026 Astral agreed to join OpenAI as part of the Codex team.

Astral is profiled on the APIs.io network. Tagged areas include Company, Developer Tools, Python, Package Manager, and Linter.

Astral’s developer surface includes documentation, getting-started guide, engineering blog, support, CLI, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

17.8/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyDeveloper ToolsPythonPackage ManagerLinterCode FormatterType CheckerCLIOpen SourceRust

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 17.8/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 8.3 / 20

Commercial Clarity 2.1 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/astral: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

CLI

CLI

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Company 5

The organization behind the API

Website

Blog

About

Twitter

LinkedIn

Source (apis.yml)

aid: astral
name: Astral
description: Astral (Astral Software Inc.) builds high-performance developer tools for the Python ecosystem, written in Rust.
  Its products are uv, an extremely fast Python package and project manager that replaces pip, pip-tools, pipx, poetry, pyenv,
  twine, and virtualenv; Ruff, an extremely fast Python linter and code formatter; and ty, a fast Python type checker and
  language server. Founded by Charlie Marsh (creator of Ruff) and backed by Accel, Caffeinated Capital, and angel investor
  Guillermo Rauch, Astral ships open-source command-line tooling distributed via PyPI, crates.io, npm, and Homebrew. In March
  2026 Astral agreed to join OpenAI as part of the Codex team.
url: https://raw.githubusercontent.com/api-evangelist/astral/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- caffeinated-capital
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/115962839?v=4
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Developer Tools
- Python
- Package Manager
- Linter
- Code Formatter
- Type Checker
- CLI
- Open Source
- Rust
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://astral.sh/
- type: DeveloperPortal
  url: https://docs.astral.sh/
- type: Documentation
  url: https://docs.astral.sh/
- type: GettingStarted
  url: https://docs.astral.sh/uv/getting-started/
- type: Blog
  url: https://astral.sh/blog
- type: GitHubOrganization
  url: https://github.com/astral-sh
- type: Support
  url: https://discord.com/invite/c9MhzV8aU5
- type: PrivacyPolicy
  url: https://astral.sh/legal/privacy
- type: About
  url: https://astral.sh/about
- type: Twitter
  url: https://x.com/astral_sh
- type: LinkedIn
  url: https://www.linkedin.com/company/astral-sh
- type: Packages
  url: packages/astral-packages.yml
- type: CLI
  url: cli/astral-cli.yml
- type: LLMsTxt
  url: llms/astral-uv-llms.txt
- type: DomainSecurity
  url: security/astral-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence