Free tool · No signup
Free API Health Check
Paste a URL and instantly see its status code, response time and whether it's up — right now, from your browser.
Check your API instantly
No account, no credit card. Just paste and check.
Instant verdict
Status code, latency and a pass/fail result for any endpoint in seconds.
See what your users see
We hit the real endpoint over HTTPS and measure the actual round-trip time.
From one check to always-on
Like the result? Monitor the same endpoint 24/7 from 5 regions, with alerts when it breaks.
Monitor it around the clock, free
One check tells you it's up now. ContinuumNexus tells you the moment it goes down — with email alerts and history on the free Hobby plan.
Frequently asked questions
- Is this API checker really free?
- Yes — the instant check is completely free and needs no account. For continuous 24/7 monitoring with alerts, create a free Hobby account.
- What does the check measure?
- It sends a real HTTP request to your URL and reports the response status code, the total response time in milliseconds, and whether the endpoint responded successfully.
- Can I monitor my API continuously?
- Absolutely. ContinuumNexus runs scheduled checks from up to 5 global regions, validates response content, and emails you when a monitor goes down or recovers.