PyRank
mcs07

pubchempy

Python wrapper for the PubChem PUG REST API.
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

pubchempy has 5.4M monthly downloads and 505 GitHub stars. Version 1.0.5 supports Python 3.10+, first published in 2013.

It is minimally maintained under a permissive license, last released in Sep 2025.

It is used by 73 tracked packages, including emmet-core, openfermion and matchms.

GitHub topics include cheminformatics, pubchem and chemistry.

Downloads
Day
316.6K
Week
2.3M
Month
5.4M
Stars
505
Forks
121
Issues
29
Version
1.0.5

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
30
Popularity
58
Adoption
100
Community
50
Provenance
100
How the maintenance status was determined
Last commit
301 days ago
Monthly downloads
5,367,021
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
5,367,021
Stars
505
Stars per 1k downloads
0.09
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
326,385
Month daily avg
178,901
Momentum
+82.4%
((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
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
301 days ago
Total releases
6
Releases/year
0.5
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
13
Monthly downloads
5,367,021
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
59
 
Issue Burden
57.4
per 1k stars
Discussions
2.0
per 1k stars
Fork Ratio
10.7%
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 302.5K
macOS 1.2K
Windows 307

Python Versions

3.12
98.3% 298.6K
3.11
1.0% 3.1K
3.10
0.4% 1.2K
3.13
0.2% 649
3.14
0.1% 235

Top Countries

1. US US
302.6K
2. SG SG
376
3. CN CN
281
4. BE BE
213
5. DE DE
141
6. IE IE
124
7. HK HK
75
8. IN IN
59
9. TW TW
41
10. NL NL
40
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
MIT
First Release
May 1, 2013
Last Release
10 months ago
Last Commit
10 months ago
Latest Version
1.0.5
Total Releases
6
Contributors
13
Open PRs
3
Archived
No
Python Versions
3 3.10 3.11 3.12 3.13
Wheels
py3
Keywords
pubchem python rest api chemistry cheminformatics
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links