Error 415: x

The web service accepts application/json , but $.ajax() with dataType : 'json' set just tries to send data as application/x-www-form-urlencoded . What's the trick here?

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dataType: 'json' specifies that jQuery expects JSON back from the server (see docs). In order to specify that you are sending JSON, you need to add contentType: "application/json" .

Furthermore, jQuery cannot convert an object into JSON for you. If you are passing any object to data , you need to stringify it yourself:

data: JSON.stringify(dataObject);

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