Why do I get the error "IP address blocked" when executing requests through the API?

Authorization Errors. If there are five authorization errors within a span of 30 minutes when calling the API scripts, the IP address is automatically blocked for 30 minutes as a security measure against password guessing. However, this blocking mechanism is overridden if the IP address is whitelisted in the settings as allowed. 

Multiple Erroneous SMS Requests. When there are 100 consecutive erroneous requests for sending SMS within 10 minutes, such as sending an SMS to an incorrect phone number or using forbidden text, the IP address is blocked for 10 minutes to mitigate the impact of frequent incorrect requests. 

Frequent Requests of the Same Type. Another reason for encountering this error is making frequent requests of the same type within a minute. For instance, repeatedly sending the same message to a single phone number or frequently checking the status of a previously sent message.