Hello @ibox ,

I believe it doesn't throw an error because you don't have any input in your API. So it doesn't really matter...

If you add an input to your API and Receive In = Body the Request Format will matter and it will throw an error if not defined.

Regards,

Pedro.

Hi ibox,

Request format is the Content format of the body request. Mandatory for POST, PUT and PATCH HTTP methods. 
The possible values are:
JSON: for JSON content;
Form URL Encoded; for URL-encoded form data;
Binary: for binary content;
Text/plain: for other content like, for example, XML. 

You can even check this View request examples.

Hope this helps

Thanks
Neha