Hello @rpotru,
ONTAP, both 7-mode and clustered, do not support REST/SOAP APIs directly to the controllers. The API they use is known as ZAPI and is XML/RPC based. The SDKs and documentation are found under the NetApp Manageability SDK on MySupport. The NMSDK has integrations for .NET, Perl, Python, C/C++, Java and more.
The NetApp PowerShell Toolkit is a PowerShell abstraction for ZAPI using the .NET SDK. Each ZAPI has an equivalent cmdlet for it's function. If you are a PowerShell user, then it's a great way to automate against your systems.
If you want to use REST with JSON (or XML), then you should give OnCommand API Services a look.
Hope that helps!
Andrew
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