API monitoring for the endpoints your product runs on
Your frontend, your mobile app and your customers’ integrations all depend on the same API. StatusEagle calls your endpoints every minute with the headers they need, checks the status code and the response body, and tells you when either is wrong.
Example check · demo data
API monitoring sends automated requests to an API endpoint at a fixed interval and checks the status code, response time and response content, alerting you when the endpoint is unavailable, slow or returning wrong data.
What to check on an API endpoint
| Check | What it catches | How in StatusEagle | Status code | Response time | Response body | Authentication | TLS certificate |
|---|---|---|---|---|---|---|---|
| 5xx errors, auth failures, missing routes | Expected status codes per monitor | ||||||
| Slow queries, overloaded instances | Recorded per location, every check | ||||||
| 200 responses with an error payload | Keyword or regex match on the body | ||||||
| Expired tokens, broken auth middleware | Custom request headers | ||||||
| Expired certs that break API clients hard | SSL expiry tracking on HTTPS monitors |
Design a health endpoint worth monitoring
A health endpoint that always returns 200 tells you nothing. A useful one checks the dependencies the API needs and says so:
GET /v1/health 200 OK { "status": "ok", "db": "ok", "cache": "ok", "queue_lag_s": 2 } 503 Service Unavailable { "status": "degraded", "db": "timeout", "cache": "ok" }Then monitor it twice: once expecting 200, and once with a keyword check for "status":"ok". Keep the endpoint cheap. It will be called from three locations every minute.
GET /v1/health
200 OK
{ "status": "ok", "db": "ok", "cache": "ok", "queue_lag_s": 2 }
503 Service Unavailable
{ "status": "degraded", "db": "timeout", "cache": "ok" }Monitoring authenticated endpoints
Add the headers the endpoint needs, typically Authorization: Bearer … or an API-key header. Create a dedicated, read-only monitoring token rather than reusing a real user’s credentials, so you can rotate it without breaking anything else. Confirm supported HTTP methods and request bodies (GET only, or POST/PUT with body)
Which endpoints to monitor
An API that looks slow from one location and fine from two others is usually a routing or CDN problem, not your code. Multi-location results show you which.
What this doesn’t replace
Synthetic API checks tell you the endpoint works from the outside. They don’t replace application tracing or error tracking inside your code, and they don’t run multi-step API workflows (create, then read, then delete). Pair them with your APM for depth, and with third-party monitoring for the APIs you call.
Related monitoring
Pair these monitoring checks to ensure complete stack coverage.
Frequently asked questions
Still deciding? Start monitoring free and verify your first service in ~2 minutes.
API monitoring repeatedly calls API endpoints and checks the status code, response time and response content, alerting you when something fails.
Your first monitor takes about two minutes.
Free plan: 10 monitors, 3 locations, 1 status page. No credit card.