I am trying to integrate our third party application with NetSuite. I want to be able to import sales invoice details generated from our third party system (which uses REST API) into the NetSuite invoice form. The frequency of import is not too crucial- an immediate import will be ideal, but sending data once a day is fine as well.
I want to know what I have to use to do this API integration - SuiteTalk, RESTlet or Suitelet.
I am completely new to this topic and after a few days of research, I learned that there are 3 options for an API integration with netsuite (Suitelets, restlets and suitetalk which comprises REST and SOAP based web services). I also learned that there are scheduled scripts and user events, but I'm not too clear on the idea.
I need some help identifying which integration option I should choose. Any and all information about netsuite API integration is appreciated!
I would avoid REST/SOAP. SOAP is outdated, and REST is incomplete and difficult to use.
Suitelet's are for when you want to present your own custom UI to frontend users, like a special new kind of custom form not relevant to any particular record. Probably not what you want.
What you probably want is to design a restlet. A restlet is a way for you to setup your own custom url inside NetSuite that your program can talk to from outside NetSuite. Like a webpage. You can pass in data to the restlet either inside the URL, or inside the body of an HTTP request (e.g. like a JSON object), and you can get data back out from the body of the HTTP response.
A restlet is a part of SuiteTalk. The method of authenticating a restlet is the same for the method of authenticating a request to the REST API. So, learning about SuiteTalk is helpful. The code you use to write the restlet, SuiteScript, is the same kind of code used to write suitelets and other kinds of scripts.
So you will want to learn about SuiteTalk, and then, in particular, SuiteTalk restlets.