The Web Services connector in IdentityNow does not exclusively support JSON content-types; it also supports XML as a content type for communication. JSON (JavaScript Object Notation) is widely used, but the connector is flexible and can be configured to handle XML-based APIs as well, depending on the requirements of the target system. Thus, it does not only support JSON.
References:
* SailPoint IdentityNow Web Services Connector Documentation.
* SailPoint IdentityNow Web Services Connector Content-Type Configuration Guide.