To protect the platform from being overloaded and maintain a high quality of service to all customers, 8x8 enforces API rate limits for its SMS API.
We have a general soft limit of 600 HTTP requests per second per sub-account (can be customized).
Using Batch API you can send up to 10 000 messages in one HTTP request, which currently is roughly equivalent to 25 000 messages per second.
Tip: If you need to submit a high volume of messages in a short period for bulk scenarios, make sure to use the endpoint allowing to Send SMS by batch instead of the single endpoint: it allows you to submit up to 10,000 SMS in a single request.
Updated about a month ago