We don't have a limit on our API calls as long as it's under reasonable use. If you're not sure about your use, feel free to just drop us a message at support@ragic.com to check with us.
While there is no limit on API usage, there is a queue mechanism for each database account. The maximum size of the queue is 20, and it stops accepting API requests when it is full. Therefore, we encourage waiting for the response of one request before sending another. Note that this limit currently only applies to GET API requests.
This is only to ensure reasonable use of our system, so that there will not be disproportionately heavy use in smaller accounts.
A manual review process will be triggered, if the usage exceeds 5 requests per second, to determine whether throttling will be applied.