Same issue here. I trigger automations programmatically from a self-hosted agent running on a VPS. Started getting the same ERROR_NOT_LOGGED_IN / 500 responses on April 3-4.
Confirmed:
API key authenticates fine (GET /v0/agents returns 200)
POST to both api2.cursor.sh/automations/webhook/ and api.cursor.com/v0/agents return 500
Manual trigger from the dashboard UI still works
Regenerating API keys doesn’t help
Plan upgrade doesn’t help
Appreciate the quick acknowledgement. Following for the fix.