What I can see are all examples on the homepage when getting a JSON file and not data back from an api.
Thank you for your question. Our component supports the data from the url. Please notice that after setting the dataSource address you should also specify the data source type. It will look like following:
Please make sure that Flexmonster component supports your JSON type. For more information about the supported JSON type please visit documentation page http://www.flexmonster.com/doc/json-data-source/.
Let us know if you have any questions.