PyRank
PrefectHQ

fastmcp-slim

🚀 The fast, Pythonic way to build MCP servers and clients.
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

fastmcp-slim has 67.1M monthly downloads and 26K GitHub stars. Version 3.4.3 supports Python 3.10+, first published in 2026.

It is actively maintained under a permissive license, last released in Jul 2026.

It is built on top of platformdirs, pydantic and pydantic-settings. It is used by 5 tracked packages, including fastmcp, fast-mcp-telegram and nanocode-cli.

GitHub topics include model-context-protocol, fastmcp and mcp.

Shared Repository
This package shares its GitHub repository (PrefectHQ/fastmcp) with 2 other packages. Stars, forks, and other GitHub metrics reflect the entire repository.
Downloads
Day
2.3M
Week
19.9M
Month
67.1M
Stars
26.0K
Forks
2.1K
Issues
240
Version
3.4.3

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
70
Popularity
91
Adoption
100
Community
70
Provenance
0
How the maintenance status was determined
Last commit
8 days ago
Monthly downloads
67,090,032
• Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
67,090,032
Stars
25,974
Stars per 1k downloads
0.39
• Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
2,849,839
Month daily avg
2,236,334
Momentum
+27.4%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
>=3.10
Cutting Edge
Minimum supported version is 3.12 or newer
• Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
Apache-2.0
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
1 days ago
Total releases
8
Releases/year
51.2
• Rapid
Last release within 365 days and > 12 releases/year
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
253
Monthly downloads
67,090,032
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
83
 
Issue Burden
9.2
per 1k stars
Discussions
9.0
per 1k stars
Fork Ratio
12.0%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 2.2M
Windows 21.9K
macOS 16.7K

Python Versions

3.13
61.4% 1.4M
3.12
20.1% 444.4K
3.11
7.7% 171.7K
3.10
6.2% 137.8K
3.14
4.6% 102.3K

Top Countries

1. US US
1.9M
2. SG SG
100.1K
3. IN IN
23.8K
4. CN CN
15.7K
5. SE SE
14.3K
6. DE DE
13.3K
7. AU AU
10.5K
8. JP JP
9.9K
9. IE IE
9.8K
10. CA CA
9.4K

Dependencies

6
42 optional dependencies

Used By

5
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
Apache-2.0
First Release
May 11, 2026
Last Release
2 days ago
Last Commit
1 week ago
Latest Version
3.4.3
Total Releases
8
Contributors
253
Open PRs
23
Archived
No
Author
Jeremiah Lowin
Python Versions
3.10 3.11 3.12 3.13
Wheels
py3
Keywords
agent fastmcp llm mcp mcp client mcp server model context protocol
Tracking Since
May 11, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links