The Cloudspeakers API can be accessed with and without an API key.
You can access the API without an API key.
The limit is 250 requests per hour per IP. Be gentle with the requests and don't waist your hourly max in a couple of seconds.
If you want a higher rate limit then get a developer API key.
This key can be generated with a Cloudspeakers account
Your API key is a secret. Your rate limit will be attached to the API key. So if you loose it or if the key is exposed to the public, others can use your key and it will cost you requests. Probably hit the rate limit sooner then you expect. If you lost the key or think it is exposed please contact us and signup for a new developers key.
You can use the API key as a GET parameter. See the example below: