Webhooks

Callbacks

A callback is an HTTP POST request with a notification made by 9bits SMS REST API to a URI of your choosing.

The REST API expects the receiving server to respond with a response code within the 2xx success range. For 5xx the callback will be retried. For 429 the callback will be retried and the throughput will be lowered. For other status codes in the 4xx range the callback will not be retried. The first initial retry will happen 30 seconds after the first try. The next attempt is after 60 seconds, then after 120 seconds. The last retry will be 3600 seconds after the initial failed attempt.

The SMS REST API offers the following callback options which can be configured for your account upon request to your account manager.

• Callback with no authentication.

• Callback with basic authentication by provisioning the callback URL with username and password..