fastapi-slim
FastAPI framework, high performance, easy to learn, fast to code, ready for production
Decision gist · record as of 2026-08-14
No. Do not install this package. The package's own documentation explicitly states 'You should not install this package' and directs you to install fastapi instead. It is deprecated, will receive no updates, and serves no purpose except as a migration aid for projects that have not yet updated their dependencies.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- This package is deprecated and should not be installed; use fastapi directly instead.
- Low install friction, but maintenance status is moot: the package is explicitly deprecated and will receive no further updates.
- Its only purpose is to redirect old projects to fastapi itself.
License · maintenance · safety
MIT (permissive) — MIT license permits free use and modification, but this is irrelevant since the package is deprecated and should not be installed.
last release 2026-02-21 (174 days) · last repo commit 2026-08-14 · 101,604 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 83,410 downloads/mo, #14,077 on PyPI
Alternatives
Verify before relying
# Do not use this package.
# Install fastapi instead:
# pip install fastapi
# If you currently have fastapi-slim in your requirements,
# replace it with:
# pip install fastapi- Whether any real projects still depend on fastapi-slim and would break if it were removed from PyPI
What it is and what it does
fastapi-slim is a deprecated shim package that does nothing except depend on fastapi. It was created as a migration path for projects that historically depended on fastapi-slim when that was a separate distribution, but all functionality has since been integrated into fastapi itself. The package is no longer maintained and will receive no updates.
The package's own documentation explicitly warns against installing it and directs users to install fastapi directly instead. It exists solely as a compatibility layer for legacy projects that have not yet updated their dependency declarations.
Use it for
- Updating legacy projects that declared fastapi-slim as a dependency to migrate them to the current fastapi package
- Temporary compatibility bridge during a codebase migration from fastapi-slim to fastapi
- Understanding why fastapi-slim exists and why it should be removed from your project
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No.
Do not install this package. The package's own documentation explicitly states 'You should not install this package' and directs you to install fastapi instead. It is deprecated, will receive no updates, and serves no purpose except as a migration aid for projects that have not yet updated their dependencies.
Install
fastapi-slim on PyPI
Before you install
Low install friction, but maintenance status is moot: the package is explicitly deprecated and will receive no further updates. Its only purpose is to redirect old projects to fastapi itself.
This package is deprecated and should not be installed; use fastapi directly instead.
License in practice
MIT license permits free use and modification, but this is irrelevant since the package is deprecated and should not be installed.
Quickstart
# Do not use this package.
# Install fastapi instead:
# pip install fastapi
# If you currently have fastapi-slim in your requirements,
# replace it with:
# pip install fastapiVerify before relying
- Whether any real projects still depend on fastapi-slim and would break if it were removed from PyPI
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagefastapi |
| Maintenance | Actively maintained 174 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 83,410 / month, #14,077 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaEnvironment :: Web EnvironmentFramework :: AsyncIOFramework :: FastAPIFramework :: PydanticFramework :: Pydantic :: 2Intended Audience :: DevelopersIntended Audience :: Information TechnologyIntended Audience :: System AdministratorsOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: InternetTopic :: Internet :: WWW/HTTPTopic :: Internet :: WWW/HTTP :: HTTP ServersTopic :: Software DevelopmentTopic :: Software Development :: LibrariesTopic :: Software Development :: Libraries :: Application FrameworksTopic :: Software Development :: Libraries :: Python ModulesTyping :: Typed |
Evidence: fastapi_slim-0.129.1-py3-none-any.whl
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