API uptime checker for small teams
Monitor important API endpoints, catch downtime and latency issues, and alert your team before users report failures.
What an API uptime checker should verify
At minimum: HTTP status codes, response time, and whether the endpoint answers from outside your stack on a schedule.
Catch slow APIs, not only hard outages
A 200 that takes too long can hurt clients before a full failure. Pair uptime checks with latency signals.
Alert routing that fits your workflow
Route failures to email, Telegram, or webhooks through alert contacts—the same channels as other SitePuls monitors.
REST and multi-step flows
When auth or tokens matter, REST monitors can chain steps so checks mirror real client behavior.
Incident history for debugging
Timelines and response-time samples help you explain when an issue started and when it recovered.
How this relates to broader API monitoring
This page targets “uptime checker” intent; the product area is the same HTTP and REST monitors in SitePuls.
Intervals and plan limits
Choose check frequency that balances freshness with API rate limits and your plan.
Where to start
Add one critical endpoint, attach contacts, then expand coverage as you learn what breaks in production.
What you can verify with SitePuls here
- Checks uptime, HTTP status codes and response time for API endpoints on a schedule.
- Route alerts to email, Telegram or webhooks through alert contacts.
- Helps catch API failures before users report them.
Where incident alerts can go
- Email addresses saved as alert contacts receive messages when incidents open or resolve (according to your notification settings).
- Telegram notifications via the SitePuls bot after you link a chat to an alert contact (including the bot /start flow for pending contacts).
- HTTPS webhooks that receive JSON with event type, monitor identifiers, status, timestamp, optional incident id, and a short message for generic integrations.
- Slack-compatible incoming-webhook formatting: alert contacts can use a dedicated mode so payloads match Slack-style incoming webhook expectations.
Practical monitoring guide
Example content below is illustrative — values are placeholders, not live customer data.
What to monitor first
- One critical API health or auth endpoint that blocks core flows.
- A read-only endpoint that mirrors customer traffic patterns.
- Any dependency that recently caused production incidents.
Example API uptime alert
API uptime check failed: POST /v1/orders returned 503 (timeout 12s)
Common mistakes
- Only checking the marketing homepage instead of the API path clients use.
- Ignoring latency until a hard timeout or full outage occurs.
- Routing all alerts to one person with no backup contact.
Frequently asked questions
What does an API uptime checker do?
It checks whether an API endpoint responds correctly and alerts your team when availability or latency fails.
Can SitePuls check API response time?
Yes. SitePuls tracks response time so you can catch slow APIs as well as outages.
Which alert channels can I use?
You can route alerts to email, Telegram or webhooks depending on your workflow.
Is this different from REST API monitoring?
Same monitors—this page focuses on uptime-checker searches; REST flows cover multi-step JSON checks.
Can I monitor internal APIs?
Only if SitePuls can reach the URL over network paths you expose (for example HTTPS on a gateway).
Will I get false positives?
Tune timeouts and assertions so checks match real client expectations.
Does SitePuls replace APM?
No—synthetic checks prove external behavior; APM instruments inside your services.
How do I start?
Create an HTTP or REST monitor, set the URL and interval, then add alert contacts.