Why there are no parameters in the callback? Why there are no parameters in the callback?

Why there are no parameters in the callback?

Nexmo Support

Symptom

Received multiple callbacks without any parameters.

Applies To

  • Webhook URL
  • 200 OK Response
  • Callbacks

Resolution

Ensure the webhook URL returns a 200 OK response even when queried without any parameters. Every time you input a webhook URL, we will first check the URL with no parameter from multiple servers and expect a 200 OK response. If the URL returns a non-200 OK response, we will not accept it.

Cause

A new or changed webhook URL is provided.