Why “Invalid Content Type”

Question

Trying to update a data field on a lead record in Marketo. Using C#. I send:

{\"action\":\"updateOnly\",\"input\":[{\"email\":\"dfranks@gm         


        

Answer 1

Content-Type is a HTTP header. Usually, you set it to application/json for REST calls.

You should do this in the code where you generate the HTTP request or REST call.

I found text/json as Content-Type and Accept header value in one of the marketo examples. You might try one of the two choices.