Hi Yosua,
Are you talking about consuming a REST service or exposing one? In your screen shot, it seems you are exposing a REST service? If so, it looks odd: it has an output, but no input.
"is it posible to create data using rest without store it to outsystems database" - Really not sure what you mean. What data do you want to "create"? Why do you not want to store this data?
"i try to make a button to see the detail data from rest api, but it sending 500 error" - A 500 error is the most generic error you can have, probably triggered by an exception in the REST service, or by explicitly setting a return code other than in the 200 range. If you have created the REST service yourself, debug it, or check Service Center to see whether there's more details.