I am creating Folders within smartsheet workspaces using smartsheet C# SDK. What all characters are allowed to use in folder name?
General naming conventions that can be used while creating folders within the app should be useable when creating and naming folders via API and the limit of up to 50 characters in the name should also still apply.
As far as the specific characters that can be used when naming a folder, if you can let us know what you would like to use for your folder name we can test it out to see if it works from an API call. In general though, folder names that can be used within the core application should be useable in API.