FWIW you can add HTTP Basic Auth information in URL links and all major browsers and other HTTP clients (for the most part) should interpret it correctly. http

FWIW you can add HTTP Basic Auth information in URL links and all major browsers and other HTTP clients (for the most part) should interpret it correctly. https://:[API_KEY]@v6.exchangerate-api.com/v6/latest/USD https://:[API_KEY]@v6.exchangerate-api.com/v6/latest/USD If you only have an API key and not a token (username) and secret (password) I recommend passing the API key as a password as some logging solutions do log the basic auth username in the data recorded.