In this article you will see how to resolve "Feed format not supported" when trying to access the site collection using a REST service in SharePoint 2013.

Problem
In SharePoint 2013, when I tried to access the site collection using a REST service http://servername/sites/Developer/_api/site I was getting an error as shown in Figure 1.
Feed-Format1-in-SharePoint 2013.jpg

Figure 1: Feed format not supported

How to resolve:
  1. In Internet Explorer click on settings, then click on "Internet Options" as shown in Figure 2.

    Feed-Format2-in-SharePoint 2013.jpg

    Figure 2: Internet Options
  2. Click on the "Content" Tab, and then click on Settings button under "Feeds and Web Slices" section as shown in Figure 3.

    Feed-Format3-in-SharePoint 2013.jpg

    Figure 3: "Settings" in Feed and Web Slices
  3. Unselect the "Turn on feed reading views" option as shown in Figure 4.

    Feed-Format4-in-SharePoint 2013.jpg

    Figure 4: Feed and Web Slice Settings
  4. Click on "Ok".
  5. Refresh the page.
  6. You will be able to access the site collection using the REST service in SharePoint 2013 as shown in Figure 5.

    Feed-Formate5-in-in-SharePoint 2013.jpg

    Figure 5: Feed format

Summary

Thus in this article you have seen how to resolve "Feed format not supported" when trying to access the site using a REST service in SharePoint 2013.