Please provide me with a document or an URL for doing integration to Create , Update and Delete USERS or give me a confirmation for Evernote does not support these operation. I am looking for Evernote REST APIs to integrate Evernote to my app. My requirement is that 1. I should be able to authenticate Evernote with my app. Are there any OAuth Based authentication supported? I am also looking for Evernote SDKs or REST APIs. Are these APIs available for Evernote or Evernote Business?