No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
marshmallow-jsonschema has 1.1M monthly downloads and 214 GitHub stars. Version 0.16.0 supports Python 3.9+, first published in 2016.
It is stably maintained under a permissive license, last released in Apr 2026.
It is built on top of marshmallow. It is used by 10 tracked packages, including flytekit, iwx-manifest-builder and emannotationschemas.
GitHub topics include marshmallow, json-schema and marshmallow-jsonschema.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
80
Popularity
51
Adoption
60
Community
60
Provenance
0
How the maintenance status was determined
Last commit
70 days ago
Monthly downloads
1,140,014
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
1,140,014
Stars
214
Stars per 1k downloads
0.19
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
32,966
Month daily avg
38,000
Momentum
-13.2%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.9
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 License
•
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
71 days ago
Total releases
24
Releases/year
2.3
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
34
Monthly downloads
1,140,014
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
52
Issue Burden
4.7
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
42.5%
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
18.1K
macOS
60
Windows
23
Python Versions
3.12
81.4%
14.5K
3.11
8.2%
1.5K
3.10
8.2%
1.5K
3.13
1.4%
258
3.14
0.9%
155
Top Countries
1.
US
16.5K
US
2.
NL
914
NL
3.
BE
265
BE
4.
DE
234
DE
5.
ID
136
ID
6.
GB
111
GB
7.
IE
92
IE
8.
AU
40
AU
9.
HK
33
HK
10.
SG
21
SG
Dependencies
1
- marshmallow >=3.13
3 optional dependencies
- marshmallow-enum[enum]
- marshmallow-oneofschema[oneofschema]
- marshmallow-union[union]
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT License
First Release
March 16, 2016
Last Release
2 months ago
Last Commit
2 months ago
Latest Version
0.16.0
Total Releases
24
Contributors
34
Open PRs
0
Archived
No
Author
Stephen Fuhry
Python Versions
3
3.9
3.10
3.11
3.12
3.13
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh