we have two questions:
To be more specific, the list of most Intel AMT API's are in the Intel AMT SDK in the "docs" folder under the name "Network Interface Guide.pdf". This is probably the single most imporant document for Intel AMT developers. The two API's that are not in that document at 3PDS (Storage Design Guide.pdf) and IDE-R/SOL (Redirection Library Design Guide.pdf).
For developers, even if you use the DTK to get started, all the DTK tools are built on top of the knowledge provided by the SDK.
Ylian (Intel AMT Blog)