Gee then why are LAMBDAS under 'API REFERENCE' if they are NOT API's : https://docs.aws.amazon.com/lambda/latest/dg/API_Reference.html

Why do they reference them as an API? https://docs.aws.amazon.com/lambda/latest/dg/runtimes-api.html

Why do they call them a REST API? https://docs.aws.amazon.com/apigateway/latest/developerguide/getting-started-with-lambda-integration.html

LOL!

They call them API's in Marketing materials ALL OVER. Who are you trying to convince??? Me??? Or yourself? :)