I would like to use the Geometry Services that ESRI publishes (project, simplify, buffer, etc...) with webmaps published through ArcGIS online.
Is it possible to use this service without my own instance of ArcGIS server? Can I utilize the Geometry Service directly from ArcGIS online and if so, what are the steps. I find that the documentation is geared more towards developers looking to use the REST and SOAP api's.
As a non-developer who knows very little in the REST and SOAP API world, how can I utilize this service within (free) maps hosted and published through ArcGIS Online?
The functionality exposed in this service is not directly accessible to users of ArcGIS Online as part of the Map Viewer and web maps. It is more of a developer tool for people building applications.