The API does not require authentication for all methods. However, in order to access private features of the API, it is necessary to supply an API key in the request header. To request an API key, please email

The HTTP header you will need to set is Authorization: ClientIdentifier API_KEY. You should only pass this over HTTPS. Sending an API key over HTTP will result in a 400 Bad Request response.

cURL example:

$ curl -sv -H 'Authorization: ClientIdentifier xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'