This page has an overview of external services (our APIs) the different add-ins rely on. Our general mantra is to do as little external communication as technically possible.
Since the COM add-in is installed locally, it has a lot less limitations in terms of connections, so we don’t need to rely on external services for the connection to Jira. See Connection with Jira for more details.
The COM add-in always connects directly to Jira! No data from Jira or your email inbox is ever sent to an external service.
There are a few helper services necessary to run the add-in though, dependent on your deployment method.
The automatic updater periodically checks for updates to the COM add-in. The following URL is accessed via TLS to check for updates and to download an update (plus it’s digital signature).