Zombie API vs Shadow API: The Crashtest
https://www.itsecurityguru.org/2023/06/26/zombie-api-vs-shadow-api-the-crashtest/
"A zombie API is an API that has been abandoned by an organisation, lingering and forgotten. A shadow (aka Rogue) API is an organisational API that has been created but never documented, so it remains unknown by the organisation." -- #RossMoore #Passageways
Mike Amundsen