Quick answer
Your API returned a 200 status code, but the checkout is broken. Here is why basic HTTP pinging is useless for complex APIs.
Status Codes Tell Half the Story
We've all been there. The dashboard shows all green, the server is returning a standard '200 OK' status, but customer support is screaming because nobody can checkout. Why? Because the server is up, but the database connection behind the API dropped, returning a JSON response like {"error": "db_timeout"}.
Testing Actual Business Logic
Basic uptime monitors just knock on the door and leave. To actually know if your API works, you have to walk inside. This means sending specific POST requests containing actual JSON payloads (like a dummy checkout cart) and attaching Bearer Authorization headers to bypass gateways.
Simulating the User Journey
By hitting the endpoint with the exact same payload your frontend application uses, you verify the entire stack: the load balancer, the API gateway, the application logic, and the database. If it breaks anywhere in that chain, you get alerted immediately. Don't trust the 200 OK. Test the payload.
Related PingStag guides
API Uptime Monitoring: How to Monitor REST APIs Properly
A practical API monitoring guide covering status codes, authentication, JSON payloads, response content, latency, and downtime alerts.
How to Monitor a POST API with a JSON Payload
A step-by-step guide to monitoring POST endpoints that require JSON request bodies, custom headers, and response validation.
REST API Health Checks: What Should You Actually Test?
Learn which checks matter for REST API health: availability, latency, status codes, response content, authentication, and dependencies.
Webhook Monitoring: How to Know When a Webhook Stops Working
Webhooks can fail silently. Learn how to monitor webhook endpoints, validate responses, and detect broken integrations before customers notice.
