Hi, I wonder if its possible to feed data into an ArcGIS online data table via an external API link to another website?
If you mean that you have a Web site with a Form to input and update data and you want these activities reflected in your ArcGIS data table. The answer is yes, use the ArcGIS Online RestApi tools provided.
https://developers.arcgis.com/rest/
Signed in members can post, follow updates, and more. New here? Register a free account.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.