This illustration shows the Postman application with the GET method selected. The URL is http://hostname.domain:port/energy/1/api/usage/current/month/4859634. The GET method, the URL, and the Send button are bordered in red, and the Send button is active.

The Headers(1) tab is selected and contains a header. my-key appears in the key field. The application key c748283c-844c-481b-aa38-8c40d9589b51 appears in the value field.

Headers(1) tab, and the header are bordered in red.