Clarity
We explain the why—not just the how—so engineers can make informed decisions quickly.
Our mission
Helping teams trust their ports
Port Checker was born from on-call frustrations. We provide a fast, reliable way to verify connectivity and a library of best practices for the ports you depend on.
Built for operators, not just scanners
We combine real-time port testing with operational guidance so engineers can solve incidents, plan migrations, and harden services without juggling multiple tools.
Empathy for on-call
Every feature is designed to reduce MTTR and provide clarity during high-pressure situations.
Documented expertise
Our guides capture lessons from SRE, NetOps, and security teams maintaining thousands of services.
Secure by default
We promote responsible testing, TLS adoption, and least-privilege access across all guides.
Community feedback
Roadmap priorities come directly from the engineers who rely on Port Checker for daily operations.
Milestones
2022
Prototype
Initial CLI scripts evolved into a web-friendly API checker shared internally at a hosting company.
2023
Public launch
We opened Port Checker to the community with multilingual support and the first wave of port guides.
2024
Automation-ready
Added API endpoints, webhook alerts, and CI examples so teams can integrate checks into pipelines.
2025
Global coverage
Expanded probes across three continents and partnered with experts to review every guide for accuracy.
What we stand for
Reliability
Our tooling and content are monitored, versioned, and continuously improved.
Inclusivity
We support multiple languages and welcome community contributions from around the world.