Sending SMS with Rest

Hello,  i’m trying to send SMS from a microflow with call rest event,  when i’m doing this from postman everything work great, but in the moment that i do the same call from Mendix i’m geeting an error in the response that no api key was send.                       
1 answers

Rom van Arendonk is correct, you should be sending the key and value pair inside the http header

like you needed to mention the structure of the data format is being imported 

 eg: value: APPLICATION/JSON   (inside the HTTP Header tab)