API monitoring in real time
✓ REST & GraphQL checks ✓ Status code validation ✓ Response time tracking ✓ Webhook alerts
Monitor API availability and performance with UptimeFlux. Our website monitoring also covers REST, GraphQL, and webhooks so your endpoints stay healthy before customers notice.
Why monitor your APIs?
APIs power modern applications. An API outage can cascade to thousands of users and critical workflows. API monitoring surfaces failures and latency spikes before they hit production users.
HTTP status codes
Watch 200, 404, 500, and more to catch errors instantly with HTTP monitoring.
Response time tracking
Spot slowdowns early with continuous monitoring before latency hurts the user experience.
Content checks
Validate expected payloads with keyword and body checks for silent API failures.
Webhook alerts
Route incidents into your stack with custom webhooks.
Supported API types
- REST APIs: Probe endpoints with GET, POST, PUT, DELETE and status validation
- GraphQL APIs: Monitor GraphQL endpoints and validate responses
- Webhooks: Confirm webhook URLs stay reachable and responding
- Authenticated APIs: Custom headers for Bearer tokens, API keys, and more
Also explore SSL monitoring to keep HTTPS APIs secure and certificates valid.
How API monitoring works
API checks work like website monitoring. UptimeFlux sends HTTP requests on your interval and evaluates:
- Endpoint availability (did it respond?)
- HTTP status code (200, 404, 500, etc.)
- Response time (latency)
- Optional response body / keyword checks
On failure, you get an immediate alert by email, SMS, or webhook.
FAQ - API monitoring
What types of APIs can I monitor?
UptimeFlux monitors any HTTP or HTTPS endpoint: REST APIs, GraphQL, webhooks, and custom URLs. We check response codes and optionally response time or body content.
How do API alerts work?
When a check fails (timeout, 5xx, or custom condition), we send an instant alert to your email, SMS or webhook so you can fix the issue quickly.
Can I check API response body or headers?
Yes. You can configure keyword checks in the response body and optionally validate status codes to ensure your API returns the expected data.
Is there an API to manage monitors?
Yes. UptimeFlux provides a REST API to create, update and list monitors programmatically, ideal for DevOps and automation.
Start monitoring your APIs
Try the free plan and monitor up to 20 APIs with no commitment.
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