https://api.bitfinex.com/v2/<endpoint>/?parameter=value... Where <endpoint> is one of the public endpoints.
In order to offer the best service possible we have added a rate limit to the number of REST requests.
Our rate limit policy can vary in a range of 10 to 90 requests per minute depending on some factors (e.g. servers load, endpoint, etc.).
When in maintenance few API endpoints (eg. books, ...) will return a maintenance error to prevent you to use potentially inconsistent data.
["error", 20060, "maintenance"]