Hi sachin,

When calling an external REST API from a microflow in Mendix, it’s important to handle various types of errors gracefully to ensure your app remains stable and user-friendly. To start, always wrap the REST call in a “Call REST Service” activity inside a Try/Catch (Error Handling) structure. For timeouts or connectivity issues, Mendix throws a technical exception, which you can catch using an error handler and then log, retry, or show a user-friendly message. For HTTP errors like 404 (Not Found) or 500 (Internal Server Error), use the “HTTP Response” output of the REST call, and check the status code. Based on the status code, you can branch your logic—e.g., show a “Not Found” message for 404 or trigger an alert for server-side errors. You can also access the response body to log more detailed information or display custom error messages. Additionally, use custom error objects or variables to store error details, making it easier to trace issues later. Handling each error type distinctly—technical, client-side (4xx), and server-side (5xx)—gives your microflows resilience and improves the overall user experience.

Hope it helps!