On initial stage, we have to register the Add-In in SharePoint, where we want to access the information. I have provided the steps below to get the Tenant Id, Access Token and data from SharePoint using PostMan utility. This is same as like registering add-in for Provider Hosted Add-In. Before that we have to get the access-token, for that we should generate Client Id and Secret information from the site by registering as an App only Add-In in SharePoint site. To get authorized from external system, we should pass access-token value as a request header along with the REST API URL. Add-In Policy – We are using this policy to authenticate the external system to access SharePointĪnd, we require the following information in various requests to authenticate with SharePoint online site.SharePoint online considers any one of the below three type of polices to authenticate the Add-In. Authentication and Authorization of SharePoint Add-Ins gives the overview of authorizing the Add-ins to access SharePoint resources by the APIs. To avoid the Unauthorized exception, we have to add some request header values to the API request. The below is the error message response, after sending the request. Because SharePoint Online is very much secured and that doesn’t allow anonymous users to access the information for their site. We will get the Unauthorized exception on accessing the information. After entering the above URL in the text-box in the URL text-box. The equivalent syntax for retrieving the website’s title is Let’s take a simple example like, getting the web title from the current site context. Now we’ll start testing the SharePoint REST API with this tool. Now we have some understanding about PostMan tool & SharePoint Rest API endpoints. If you are new to SharePoint REST API or you want to know more about REST endpoints in SharePoint visit the link Get to know the SharePoint 2013 REST service. We can get this utility from chrome extension and you can get that from this link PostMan Chrome Extension. By using this tool we’ll fetch or update any information from SharePoint using REST API endpoints. This is a developer friendly tool for handling the REST APIs from any platform. As a developer, you may very much interested in using the PostMan tool for accessing the REST APIs. In all the ways, the authentication plays the important role in authorizing the access to get the information. There are lot of ways to access the SharePoint API to fetch or update its resources.
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