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.