Use the API Key that was emailed to you when you signed up to authenticate every request you send to the API.
Without it you only have access to a tiny amount of data in a random order, and cannot upload, vote or favourite.
You can send your API Key as a header or a query parameter
The best & most secure way to send it
Set your API Key as the x-api-key header on evey request.
e.g headers[“x-api-key”] = "ABC123"
The least secure way, and not advisable unless there is no other way.
Intended for use in IoT use-cases & backwards compatibility
Pass as the api_key query parameter