In order to authenticate your requests, provide the Authorization header with the keyword Bearer followed by a space and your API key.
If you don't have an API key yet, feel free to contact us via hallo@melon.markets.
$ curl \
'https://api.melon.markets/markets/beta/instruments/IE000CNSFAR2/latest-quote' \
-H 'Authorization: Bearer mm_1c••••••••' \