A run comes back green and processed nothing
n8n marks the execution successful while the last producing node returned 0 items. A renamed API field does this: the workflow still finishes, and the CRM stays empty. The zero-item rule opens one incident unless you have marked that workflow as allowed to be empty.
When an API renames a fieldA trigger stops firing
The workflow is still active, but no successful run lands inside the silence window you set. Dead webhooks and polling triggers look like this. There is no failed execution, so an error workflow never sends mail.
When a workflow stops triggeringA credential expired overnight
Google OAuth tokens and service accounts fail in the execution, not in a status page. The Free n8n Health Check calls out credential failures it can read from those errors. Ongoing monitoring alerts when the error rate crosses the threshold you set.
When Google credentials expireA Make scenario was left off
LeadPulse does not log into Make. You add a heartbeat URL at the end of the scenario. If the scenario is deactivated, or the call is late, or the count is 0, that heartbeat opens an incident.
When a Make scenario deactivates