API monitoring

Monitor whole API flows — not just whether one endpoint returns 200.

UptimeEye checks your REST endpoints and chains them into multi-step flows with variable extraction and assertions, from up to 6 regions (Agency; Pro 3, Free 1) — so you catch broken APIs before your integrations do.

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Free plan • No credit card • Commercial use allowed • Multi-step flows on every plan

Everything you need to trust your API

From a single health check to a full authenticated flow — validated continuously from around the world.

REST endpoint checks

Send GET, POST, PUT or DELETE requests with custom headers and body, and verify the status code and response from up to 6 regions (Agency; Pro 3, Free 1), every 30 seconds on Pro and Agency (every 5 minutes on Free).

Multi-step API flows

Chain requests into a flow — authenticate, create a resource, read it back — and pass values between steps with variable extraction. Included on every plan, even free.

Response assertions

Assert on status code, response time, headers and JSON body fields, so a 200 that returns the wrong data still fails the check.

Authenticated flows

Log in, capture a token, and reuse it in later steps to monitor endpoints behind authentication — not just public routes.

Latency by region

Track response times to your API from each region and spot regressions before they turn into timeouts for your clients.

Alerts on every channel

Slack, Discord, Telegram, MS Teams, PagerDuty, generic webhooks or email — and again the moment your API recovers.

Why teams monitor APIs with UptimeEye

German company, EU data residency

UptimeEye is built and operated in Germany, your monitoring data is stored in the EU, and the GDPR applies by default — with a DPA for business customers.

Multi-step flows on every plan

Full API flows with variable extraction are included even on the free plan, not sold as an add-on.

API-first, no-code flows

Build flows in the UI without writing scripts, and manage everything over a documented REST API when you'd rather automate it.

Frequently asked questions

What is API monitoring?

API monitoring continuously checks that your API endpoints are reachable and returning the correct responses. UptimeEye sends real requests from up to 6 regions (Agency; Pro 3, Free 1), verifies status codes, response times and JSON fields, and can chain multiple requests into a flow — alerting you the moment your API misbehaves.

What is multi-step API monitoring?

A multi-step flow runs several API requests in sequence and passes values between them — for example: log in, extract the auth token, call an authenticated endpoint, and assert on the result. UptimeEye includes multi-step API flows with variable extraction on every plan, including the free tier (5 steps per flow, 10 on Pro).

Can I monitor authenticated APIs?

Yes. You can send custom headers, log in as a first step and extract a token or session, then reuse it in later steps — so you can monitor endpoints that require authentication, not just public ones.

How can I monitor my API for free?

The UptimeEye free plan includes 5 monitors and multi-step flows, with commercial use allowed and no credit card required — enough to keep an eye on your most important endpoints and one critical flow for free.

Where is my monitoring data stored?

UptimeEye is a German company and all monitoring and account data is stored in the European Union, GDPR applies by default, and we provide a DPA for business customers. See our trust page for details.

Start monitoring your API in 5 minutes

Add your first endpoint or build a multi-step flow, pick your alert channels, and let UptimeEye validate your API around the clock from up to 6 regions (Agency; Pro 3, Free 1). The free plan is enough to get started.

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Free plan with commercial use allowed • No credit card • Pro at €29/month