Who should use certmonitor?

certmonitor is an open-source project built for python developers and security engineers.

Does certmonitor have a free plan?

Yes — certmonitor is open source under the MIT license and free to use.

What platforms does certmonitor run on?

certmonitor runs on the command line. It can also be self-hosted.

Is certmonitor still maintained?

The GitHub repository shows 74 commits in the last 90 days.

Who makes certmonitor?

certmonitor is developed by Brad H11.

How long has certmonitor been around?

certmonitor first shipped in 2024.

Is certmonitor open source?

Yes — certmonitor is open source under the MIT license, developed on GitHub.

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certmonitor

Name: certmonitor
Author: Brad H11

PyPIInfrastructure

certmonitor is a zero-dependency Python package and command-line tool for monitoring and validating SSL/TLS certificates. It checks expiration, hostname and SAN matching, X.509 chains, and post-quantum readiness for developers and security teams.

Open SourceMITCLISelf-hosted

Visit PyPI

16stars

3forks

7features

2024since

Overview

7 features

certmonitor sits in PulseGate's Other security & compliance category. It focuses on monitoring certificate validity and detecting SSL/TLS, hostname, chain, and post-quantum readiness issues. certmonitor is an open-source project aimed at python developers and security engineers. certmonitor is open source under the MIT license. It runs on the command line, and it can be self-hosted.

Brad H11 builds and maintains certmonitor, and it first shipped in 2024. The project is developed in the open on GitHub with 16 stars and 74 commits in the last 90 days. Among its 7 catalogued features are expiration checks, hostname matching, and SAN matching.

Summary written by a language model from the project’s public pages.

Expiration checks
Hostname matching
SAN matching
X.509 analysis
Chain validation
Post-quantum checks
Certificate monitoring

Built with & integrations

Written with

Claude Code

Runs on

CLISelf-hosted

Written with — evidence

Claude Code: .claude/

Trust & compliance

License

MIT

Verified signals

HTTPSOpen SourceFree tierGitHub · ★ 16Active maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed7 Sept · 05:04 UTC
certmonitor verified via PyPI Fresh Feed
Source: PyPI Fresh Feed · Open

Frequently asked questions about certmonitor

What is certmonitor?: Certmonitor focuses on monitoring certificate validity and detecting SSL/TLS, hostname, chain, and post-quantum readiness issues. It is catalogued under Other security & compliance on PulseGate.
Who should use certmonitor?: certmonitor is an open-source project built for python developers and security engineers.
Does certmonitor have a free plan?: Yes — certmonitor is open source under the MIT license and free to use.
What platforms does certmonitor run on?: certmonitor runs on the command line. It can also be self-hosted.
Is certmonitor still maintained?: The GitHub repository shows 74 commits in the last 90 days.
Who makes certmonitor?: certmonitor is developed by Brad H11.
How long has certmonitor been around?: certmonitor first shipped in 2024.
Is certmonitor open source?: Yes — certmonitor is open source under the MIT license, developed on GitHub.

At a glance

Platforms: CLI
Languages: English
Open source: Yes · ★ 16
License: MIT
Built for: Python developers and security engineers
Model: Open source
Solves: Monitoring certificate validity and detecting SSL/TLS, hostname, chain, and post-quantum readiness issues.

Registered as

GitHub: bradh11/certmonitor
PyPI: certmonitor

Developer

Brad H11

Small team

GitHub

Open source

View on GitHub

Stars: 16
Forks: 3
Open issues: 3
Last commit: 6 Sept 2026
Commits 90d: 74
Contributors: 3
Authorship: Small team
Default branch: develop
Latest release: v0.5.2 · 6 Sept 2026

Index record

Indexed: 7 Sept 2026
Lifecycle: Alive
Last seen: 7 Sept 2026

Identity audit (13)

Slug: certmonitor-pypi-org
Lifecycle last checked: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 7 Sept 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model from page content.
Last updated: 7 Sept 2026
Canonical URL: https://pypi.org/project/certmonitor

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