API uptime checker for continuous endpoint monitoring
This page is for setting up ongoing API availability checks — not a one-time public test. You add an endpoint as a monitor, SitePuls checks it on a schedule for expected status and response behavior, keeps check history, and sends downtime or recovery alerts. There is no instant checker form on this page; start by creating a monitor in your account.
Scheduled checks, not a one-off paste
An API uptime checker here means continuous monitoring: after you create the monitor, SitePuls repeatedly calls the URL you configure and compares the result with your expectations.
Availability and expected response
Checks can validate that the endpoint answers and that the HTTP status matches what you set. Response duration is recorded so you can see when answers slow down, not only when they fail hard.
Downtime and recovery alerts
When a check fails, SitePuls can open an incident and notify email, Telegram, or webhook contacts. When the endpoint recovers, recovery follows the same alert workflow.
History you can review later
Successful and failed runs leave samples in monitor history so you can see when availability dropped and when it returned — useful after deploys or dependency incidents.
How this differs from a manual curl
A manual curl proves the endpoint once. Continuous monitoring repeats the check without someone watching the terminal, so overnight and intermittent failures still surface.
Relation to the API monitoring hub
This landing focuses on creating a scheduled uptime check. The broader API monitoring hub covers multi-step REST flows, payloads, and the full product overview.
Choose an interval that fits the API
Pick a check frequency that balances freshness with rate limits and your plan. Critical endpoints usually need tighter intervals than low-traffic health paths.
Create the monitor to begin
Sign up or sign in, add the API URL as an HTTP or REST monitor, attach alert contacts, then let SitePuls run the schedule. Need setup steps? Use the how-to guide after you decide to create the check.
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 put on a continuous check 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 continuous API uptime alert
API uptime check failed: POST /v1/orders returned 503 (timeout 12s)
Common mistakes
- Expecting an instant public test instead of creating a scheduled monitor.
- 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 monitor?
It monitors whether a configured API endpoint stays available with the expected HTTP status and records response duration on each scheduled run.
Is this a one-time test or continuous monitoring?
Continuous monitoring. You create a monitor once; SitePuls keeps checking on the interval you choose. This page does not run anonymous one-off endpoint tests.
What happens when an endpoint becomes unavailable?
A failed check can open a downtime incident and notify the alert contacts attached to the monitor.
Can alerts go to email, Telegram or webhook?
Yes. Route downtime and recovery notices through email, Telegram, or webhook alert contacts.
What response conditions can be checked?
HTTP monitors validate reachability and expected status; response duration is stored. REST monitors can also assert on JSON paths when you configure them.
Does the checker require creating a monitor?
Yes. There is no anonymous endpoint field on this page — create a monitor in your account to start continuous checks.
How is this different from the REST API guide?
This page is about continuous availability checking. The REST guide focuses on multi-step JSON flows and contract-style assertions.
Where do I create the uptime monitor?
Use the signup or dashboard flow to add an HTTP or REST monitor for your API URL, then attach contacts and an interval.