Uptime Monitoring
DownWarning continuously checks your websites, APIs, and servers using four distinct check types. The moment a check fails, you receive an alert through Slack, Telegram, Teams, Email, or a custom Webhook — so you can fix the problem before your customers even notice.
HTTP / HTTPS
Send GET or HEAD requests to any URL and validate the status code, response body, or response time. Supports custom headers, authentication, and follow-redirects.
Ping (ICMP)
Measure round-trip latency and packet loss to any hostname or IP address with ICMP echo requests. Ideal for monitoring network-level reachability.
Port (TCP)
Open a TCP connection to a specific port and verify the service is accepting connections. Perfect for databases, mail servers, game servers, and custom daemons.
DNS
Resolve DNS records and validate the returned values match your expectations. Catch propagation issues, hijacking, or misconfigurations before they impact users.
Why uptime monitoring matters
Every minute of downtime costs revenue, erodes customer trust, and damages your search engine rankings. Proactive monitoring closes the gap between an outage starting and your team knowing about it. With check intervals as low as 30 seconds and multi-channel alerting, DownWarning ensures you are always the first to know.
Start monitoring for free with up to 25 monitors on the Starter plan — no credit card required.
Beyond alerting, every monitor includes a shareable public status page, uptime history, and response-time graphs, so you can show customers real numbers instead of just saying "we're working on it." Combine HTTP, Ping, Port, and DNS checks on the same endpoint for a complete picture of what "up" actually means for your service. A service can respond to Ping while its application layer is throwing errors on every request — which is why relying on a single check type usually means missing exactly the outage that matters.
Uptime Monitoring FAQ
What's the difference between HTTP and Ping monitoring?
HTTP checks validate that your application layer is actually working: status codes, response bodies, and load time. Ping only confirms the host responds to ICMP, which is useful for network-level reachability but says nothing about whether your app is serving correct responses.
How often does DownWarning check my services?
Check intervals are configurable per monitor, down to as little as 30 seconds on paid plans. Faster intervals mean less time between an outage starting and you finding out about it.
Can I monitor internal APIs that aren't publicly reachable?
Yes. Deploy a local agent inside your network to monitor internal services, databases, and APIs the same way, without opening any inbound ports. See how local agents work for the full setup.
Do I need a different tool for each check type?
No. HTTP, Ping, Port, and DNS checks live in the same dashboard and can run against the same host, so a single monitor can tell you whether a service is reachable at the network level and whether it's actually serving correct responses. There's no separate tool to buy, learn, or maintain for each check type.