Use HTTP Basic Auth to authenticate with our API. You must send your API key with every request. Put your API key as the basic auth username and leave the password blank:

curl -u API_KEY: -H "Accept: application/json; version=1" --request POST --header 'Content-Type: application/json'

If your API key is missing, the API will respond with a 401 status code. When the provided key is wrong or deactivated, the API will respond with a 403 status code. All three situations return a human-readable response specific to the situation.