OCAPI Resource Data Formats
The Open Commerce API currently supports two data formats for resources: JSON and XML. JSON is the default format, but you can explicitly specify XML.
How you specify a format depends on the underlying HTTP method. For GET requests, you provide a value for the URL request parameter format (valid values are json and xml). For POST, PUT, and PATCH requests, you provide a value for the HTTP header content-type (valid values are application/json, application/xml, and text/xml). The HTTP header content-type has precedence over the URL request parameter format.
The Open Commerce API supports character encoding in UTF-8 only.