Check any port with complete clarity.
Fast, accurate port checks with API access, curl support, and clean diagnostics for developers, gamers, and infrastructure teams.
Port check
Run a public connectivity check for hostnames, IPs, ports, DNS, and web reachability.
Ready
Turnstile-gated website checks run through the unified connectivity API.
Complete Turnstile before running a live check. View API contract
Realtime checks
Instant results, globally.
API-first
RESTful API built for scale.
curl-ready
Simple CLI and automation.
Machine-readable
OpenAPI, catalogs, agent skills.
Product depth
Built for people who need the answer fast and the raw details immediately after.
Live diagnostics
93.184.216.34 : 443 OPEN 18.4 ms
Port Scanner
Realtime diagnostics with a landing page that feels like a real product.
- Focused single-port checks for the exact service you care about
- Curated pages for ports like `22`, `443`, `25565`, and `3389`
- Readable explanations instead of packet-capture jargon
Response 200 OK
{
"ip": "93.184.216.34",
"port": 443,
"status": "open",
"protocol": "tcp",
"service": "https",
"latency_ms": 18.4,
"region": "AMS, NL"
} Developer-first API
Clean JSON responses, stable metadata, and documented discovery surfaces.
- Predictable status, latency, and service fields on every response
- OpenAPI, api-catalog, and agent-skill metadata ready to consume
Terminal cURL
$ curl https://probe.kordu.tools/api/probe -H "Content-Type: application/json" -d '{"target":"93.184.216.34","port":443,"turnstileToken":"<token>"}'
{
"status": "open",
"latencyMs": 18.4,
"target": "93.184.216.34"
} curl & CLI ready
Every check points straight to the terminal command you can run next.
- Quick shell confirmation after the web check
- Useful for home labs, game servers, and production services