No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
h11 has 828.8M monthly downloads and 559 GitHub stars. Version 0.16.0 supports Python 3.8+, first published in 2016.
It is showing limited recent maintenance under a permissive license, last released in Apr 2025.
It is used by 912 tracked packages, including httpcore, uvicorn and wsproto.
GitHub topics include http and sans-io.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
30
Popularity
58
Adoption
70
Community
60
Provenance
0
How the maintenance status was determined
Last commit
438 days ago
Monthly downloads
828,848,615
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
828,848,615
Stars
559
Stars per 1k downloads
0.00
•
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
26,633,298
Month daily avg
27,628,287
Momentum
-3.6%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.8
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
MIT
•
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
438 days ago
Total releases
13
Releases/year
1.3
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
44
Monthly downloads
828,848,615
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
65
Issue Burden
48.3
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
47.3%
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
18.2M
Windows
453.2K
macOS
242.0K
Python Versions
3.12
36.7%
6.6M
3.11
26.1%
4.7M
3.10
17.1%
3.1M
3.13
13.9%
2.5M
3.14
6.3%
1.1M
Top Countries
1.
US
13.8M
US
2.
SG
1.1M
SG
3.
IN
630.1K
IN
4.
DE
439.3K
DE
5.
NL
320.7K
NL
6.
FR
282.8K
FR
7.
IE
256.7K
IE
8.
GB
209.4K
GB
9.
JP
186.1K
JP
10.
HK
134.9K
HK
Dependencies
0
No dependencies
Used By
912
- httpcore
- uvicorn
- wsproto
- pinotdb
- httpcore2
- hypercorn
- mitmproxy
- seleniumbase
- agno
- mistral-vibe
- urllib3-future
- nicegui
- matrix-nio
- aider-chat
- astrapy
- sap-ai-sdk-gen
- foundry-platform-sdk
- acryl-datahub-actions
- mocket
- gpt-researcher
- kserve
- asysocks
- driftpy
- gridstatus
- langchain-together
- aptos-sdk
- blacksheep
- llama-stack
- httpcorexyz
- hap-python
- fastapi-keycloak
- iatoolkit
- docassemble-webapp
- bloomerp
- aftership-tracking-sdk
- qm-saas
- swarmauri-standard
- encryptors
- iqcc-cloud-client
- datahub-agent-context
- async-firebase
- dve-lumipy-testing
- gable
- zapros
- nv-ingest
- aignostics
- async-customerio
- aidev-agent
- bengal-pounce
- oarepo
Package Information
License
MIT
First Release
May 14, 2016
Last Release
1 year ago
Last Commit
1 year ago
Latest Version
0.16.0
Total Releases
13
Contributors
44
Open PRs
14
Archived
No
Author
Nathaniel J. Smith
Python Versions
3
3.8
3.9
3.10
3.11
3.12
Wheels
py2
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh