No, only requests that actually generate random values are counted towards your key's daily request limit. This means you can invoke the following methods from the Basic and Signed APIs ‘for free:’
We have DoS protection in place that will kick in if you issue more than 10 requests/second from the same IP address. If this happens, your IP address will be blocked for 24 hours.
If your applications requires a higher rate than 10 requests/second, please get in touch and we will help. Please do not distribute your traffic across several IP addresses to try and circumvent our DoS protection.
You can have up to 10 API keys in a regular RANDOM.ORG account. If you need more, please let us know.
We are happy to take additional questions! Just drop us an email.