Why am I receiving the "429 Too Many Requests" status code as a response to API calls?

API requests to App Configuration service is returning the HTTP status code as 429.

All the APIs of the App Configuration service are rate-limited. Excessive number of requests sent to App Configuration from a single source will be blocked if they exceed the threshold value within a specific time period.

Evaluate the reason of the excessive requests being sent to App Configuration exceeding the threshold value. Also, you may retry the request again after the interval specified in the retry-after response header.