No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
mcap has 1.5M monthly downloads and 994 GitHub stars. Version 1.4.0 supports Python 3.7+, first published in 2022.
It is actively maintained under a permissive license, last released in Jun 2026.
It is built on top of lz4 and zstandard. It is used by 43 tracked packages, including mcap-protobuf-support, mcap-ros2-support and mcap-ros1-support.
GitHub topics include robotics, data and serialization.
Package Insights
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
65
Adoption
70
Community
80
Provenance
100
How the maintenance status was determined
Last commit
2 days ago
Monthly downloads
1,492,316
•
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
1,492,316
Stars
994
Stars per 1k downloads
0.67
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
49,326
Month daily avg
49,744
Momentum
-0.8%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.7
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
18 days ago
Total releases
26
Releases/year
5.9
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
86
Monthly downloads
1,492,316
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
95
Issue Burden
18.1
per 1k stars
Discussions
162.0
per 1k stars
Fork Ratio
39.8%
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
22.0K
macOS
194
Windows
83
Python Versions
3.12
45.0%
9.3K
3.11
23.1%
4.8K
3.10
20.6%
4.3K
3.9
6.6%
1.4K
3.14
4.7%
971
Top Countries
1.
US
21.0K
US
2.
NL
478
NL
3.
DE
459
DE
4.
GB
215
GB
5.
JP
200
JP
6.
IE
107
IE
7.
SG
106
SG
8.
IN
74
IN
9.
CN
70
CN
10.
SE
63
SE
Used By
43
- mcap-protobuf-support
- mcap-ros2-support
- mcap-ros1-support
- foxglove-client
- foxglove-data-platform
- xdof-sdk
- roboto
- tabular2mcap
- logqs
- kappe
- databeam-mcap-reader
- artefacts-cli
- project-ghost
- mcap-owa-support
- mcap-ros2idl-support
- lw-egosuite-devkit
- rosbag-resurrector
- betterosi
- mcap-bag-parser
- mcap-data-loader
- manastone-diag
- rosbag-checker
- ros-agent
- asam-osi-utilities
- mcap2img
- robot-dam
- mcap2shadowimg
- kitti2mcap
- kiwi-booster
- spirems
- tairos-data-convert
- mcap-to-mp4
- hex-util-data
- mcap-mcp-server
- mcap2handvideo
- stera-sdk
- utrompulse
- zpe-robotics
- dexdata
- thebrian
- zpe-motion-kernel
- xdof
- visio-schema
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT License
First Release
February 14, 2022
Last Release
2 weeks ago
Last Commit
3 days ago
Latest Version
1.4.0
Total Releases
26
Contributors
86
Open PRs
22
Archived
No
Python Versions
3
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh