Determine Bundle UUID

Find bundle in one of the candidate locations:

~/Library/Application Support/MailMate/Bundles/
~/Library/Application Support/MailMate/Managed/Bundles/
MailMate.app/Contents/SharedSupport/Bundles/

Default bundles are found at Managed/Bundles.

From the bundle directory, find the command in the “Commands” folder and then run the following

plutil -convert json -o - Commands/Add.mmCommand

where Commands/Add.mmCommand is the name of the command.

Prettier version requiring json_pp :

plutil -convert json -o - Commands/Add.mmCommand | json_pp