PyPI · #359 most downloaded on PyPI

fastmcp

4.0.587M downloads/moPrefectHQ/fastmcp ↗New releases in your daily digest, changelog included.

The fast, Pythonic way to build MCP servers and clients.

Last release 4 days ago
17 Sep 2026
Ships fairly regularly
a new release about every 2 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
2 years old
122 releases · first in 2024

Release timeline

122 releases since 2024

202420252026

20242026

One column per month.

Releases

0.3.53 Dec 2024
This release is highlighted by the ability to handle complex JSON objects as MCP inputs and improved Windows compatibility.
This release is highlighted by the ability to handle complex JSON objects as MCP inputs and improved Windows compatibility.



What's Changed

New Features 🎉

Set up multiple os tests by @jlowin in https://github.com/jlowin/fastmcp/pull/44

Changes to accomodate windows users. by @justjoehere in https://github.com/jlowin/fastmcp/pull/42

Handle complex inputs by @jurasofish in https://github.com/jlowin/fastmcp/pull/31

Docs 📚

Make AI labeler more conservative by @jlowin in https://github.com/jlowin/fastmcp/pull/46

Other Changes 🦾

Additional Windows Fixes for Dev running and for importing modules in a server by @justjoehere in https://github.com/jlowin/fastmcp/pull/43

New Contributors

@justjoehere made their first contribution in https://github.com/jlowin/fastmcp/pull/42

@jurasofish made their first contribution in https://github.com/jlowin/fastmcp/pull/31

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.3.4...v0.3.5
Open source →
Additional notes2 sources agree
This release is highlighted by the ability to handle complex JSON objects as MCP inputs and improved Windows compatibility.

New Features 🎉

Set up multiple os tests by @jlowin in #44

Changes to accommodate windows users. by @justjoehere in #42

Handle complex inputs by @jurasofish in #31

Docs 📚

Make AI labeler more conservative by @jlowin in #46

Other Changes 🦾

Additional Windows Fixes for Dev running and for importing modules in a server by @justjoehere in #43

New Contributors

@justjoehere made their first contribution in #42

@jurasofish made their first contribution in #31

Full Changelog: v0.3.4...v0.3.5 </Update>

<Update label="v0.3.4" description="2024-12-02">

0.3.42 Dec 2024

What's Changed

Fixes 🐞

Handle missing config file when installing by @jlowin in https://github.com/jlowin/fastmcp/pull/37
Remove BaseURL reference and use AnyURL by @jlowin in https://github.com/jlowin/fastmcp/pull/40

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.3.3...v0.3.4

Open source →

Additional notes2 sources agree

Fixes 🐞

Handle missing config file when installing by @jlowin in #37
Remove BaseURL reference and use AnyURL by @jlowin in #40

Full Changelog: v0.3.3...v0.3.4 </Update>

Open source →

0.3.32 Dec 2024

What's Changed

New Features 🎉

Surge example by @zzstoatzz in https://github.com/jlowin/fastmcp/pull/29
Support Python dependencies in Server by @jlowin in https://github.com/jlowin/fastmcp/pull/34

Docs 📚

add Contributing section to README by @zzstoatzz in https://github.com/jlowin/fastmcp/pull/32

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.3.2...v0.3.3

Open source →

Additional notes2 sources agree

New Features 🎉

Surge example by @zzstoatzz in #29
Support Python dependencies in Server by @jlowin in #34

Docs 📚

add Contributing section to README by @zzstoatzz in #32

Full Changelog: v0.3.2...v0.3.3 </Update>

Open source →

0.3.21 Dec 2024

What's Changed

New Features 🎉

Support env vars when installing by @jlowin in https://github.com/jlowin/fastmcp/pull/27

Docs 📚

Remove top level env var by @jlowin in https://github.com/jlowin/fastmcp/pull/28

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.3.1...v0.3.2

Open source →

Additional notes2 sources agree

New Features 🎉

Support env vars when installing by @jlowin in #27

Docs 📚

Remove top level env var by @jlowin in #28

Full Changelog: v0.3.1...v0.3.2 </Update>

Open source →

0.3.11 Dec 2024

What's Changed

New Features 🎉

Update README.md by @jlowin in https://github.com/jlowin/fastmcp/pull/23
add rich handler and dotenv loading for settings by @zzstoatzz in https://github.com/jlowin/fastmcp/pull/22
print exception when server can't start by @jlowin in https://github.com/jlowin/fastmcp/pull/25

Docs 📚

Update README.md by @jlowin in https://github.com/jlowin/fastmcp/pull/24

Other Changes 🦾

Remove log by @jlowin in https://github.com/jlowin/fastmcp/pull/26

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.3.0...v0.3.1

Open source →

Additional notes2 sources agree

New Features 🎉

Update README.md by @jlowin in #23
add rich handler and dotenv loading for settings by @zzstoatzz in #22
print exception when server can't start by @jlowin in #25

Docs 📚

Update README.md by @jlowin in #24

Other Changes 🦾

Remove log by @jlowin in #26

Full Changelog: v0.3.0...v0.3.1 </Update>

Open source →

0.3.01 Dec 2024

What's Changed

New Features 🎉

Update README by @jlowin in https://github.com/jlowin/fastmcp/pull/3
Make log levels strings by @jlowin in https://github.com/jlowin/fastmcp/pull/4
Make content method a function by @jlowin in https://github.com/jlowin/fastmcp/pull/5
Add template support by @jlowin in https://github.com/jlowin/fastmcp/pull/6
Refactor resources module by @jlowin in https://github.com/jlowin/fastmcp/pull/7
Clean up cli imports by @jlowin in https://github.com/jlowin/fastmcp/pull/8
Prepare to list templates by @jlowin in https://github.com/jlowin/fastmcp/pull/11
Move image to separate module by @jlowin in https://github.com/jlowin/fastmcp/pull/9
Add support for request context, progress, logging, etc. by @jlowin in https://github.com/jlowin/fastmcp/pull/12
Add context tests and better runtime loads by @jlowin in https://github.com/jlowin/fastmcp/pull/13
Refactor tools + resourcemanager by @jlowin in https://github.com/jlowin/fastmcp/pull/14
func → fn everywhere by @jlowin in https://github.com/jlowin/fastmcp/pull/15
Add support for prompts by @jlowin in https://github.com/jlowin/fastmcp/pull/16
Create LICENSE by @jlowin in https://github.com/jlowin/fastmcp/pull/18
Update cli file spec by @jlowin in https://github.com/jlowin/fastmcp/pull/19
Update readmeUpdate README by @jlowin in https://github.com/jlowin/fastmcp/pull/20
Use hatchling for version by @jlowin in https://github.com/jlowin/fastmcp/pull/21

Other Changes 🦾

Add echo server by @jlowin in https://github.com/jlowin/fastmcp/pull/1
Add github workflows by @jlowin in https://github.com/jlowin/fastmcp/pull/2
typing updates by @zzstoatzz in https://github.com/jlowin/fastmcp/pull/17

New Contributors

@jlowin made their first contribution in https://github.com/jlowin/fastmcp/pull/1
@zzstoatzz made their first contribution in https://github.com/jlowin/fastmcp/pull/17

Full Changelog: https://github.com/jlowin/fastmcp/compare/v0.2.0...v0.3.0

Open source →

Additional notes2 sources agree

New Features 🎉

Update README by @jlowin in #3
Make log levels strings by @jlowin in #4
Make content method a function by @jlowin in #5
Add template support by @jlowin in #6
Refactor resources module by @jlowin in #7
Clean up cli imports by @jlowin in #8
Prepare to list templates by @jlowin in #11
Move image to separate module by @jlowin in #9
Add support for request context, progress, logging, etc. by @jlowin in #12
Add context tests and better runtime loads by @jlowin in #13
Refactor tools + resourcemanager by @jlowin in #14
func → fn everywhere by @jlowin in #15
Add support for prompts by @jlowin in #16
Create LICENSE by @jlowin in #18
Update cli file spec by @jlowin in #19
Update readmeUpdate README by @jlowin in #20
Use hatchling for version by @jlowin in #21

Other Changes 🦾

Add echo server by @jlowin in #1
Add github workflows by @jlowin in #2
typing updates by @zzstoatzz in #17

New Contributors

@jlowin made their first contribution in #1
@zzstoatzz made their first contribution in #17

Full Changelog: v0.2.0...v0.3.0 </Update>