First, it starts with some basic information.
Name: What do you want the API to be called?
Verb: Which REST Verb would you like to use? Get: Retrieve the information. Post: Create/edit a new record. Delete: Permanently get rid of a record.
Description: How would you describe your API? (this is optional).
Authentication: Disabled(default value): the API doesn't need authentication for it to be used. User Authentication: the API requires the user to be logged in to use this API.