When reaching the maximum number of API calls, "429 Too Many Requests" is returned. There are two types of limits in the API:
- Maximum number of requests per minute. This is given by exp (n / 250) * 60 where n is the number of VPS under the client account
- Fixed call frequency limit. Some functions have a time-out period for the security or difficulty to re-call the function. In the following list are the limited functions and the interval in seconds.