iCloud mail REST API

I am wondering if Apple allows us to get access to iCloud Mail inbox and read user's messages in iOS application? 

I did a lot of research but couldn't find a concrete answer. 

For example, on Google, this is possible by using OAuth.

Im a android developer working with java and i have same question about APIs because if im a user for android and have iCloud mail its so hard to me to find a good and quick app to see my mailbox or if i found it when i trying to open my mail get errors and ask me about many things i shouldn't know as a normal user

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iCloud mail REST API
 
 
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