HTTP error response code

Twilio sent a webhook to your server and your server responded with a 4xx or 5xx status code.

• There was an error in your server (500).
• There was a problem between your proxy and your server (502, 503, 504).
• The URL specified in your webhook configuration is incorrect (404, 410).
• Your server is attempting to rate limit Twilio's webhook requests (429). Twilio's webhooks do not support rate limiting.
• Your webhook configuration does not have appropriate permissions to call the configured URL (403).

• Review the configured webhook URL to ensure that it is correct.
• Look for and fix errors in your server logs.
• Ensure that you can get 2xx status codes by calling your webhook URL.
• Review your proxy and authentication configurations.
• For rate limiting issues, consider shifting to Event Streams HTTP Sink which support rate limiting .