63117: Downstream Service Unavailable at the moment

This error means Twilio could not complete the request because one or more downstream services were unavailable and the request returned a 503 response. A 503 response indicates the service is temporarily unavailable.

• A downstream dependency was down or experiencing a transient issue when Twilio processed the request.
• A temporary Twilio service unavailability prevented the request from completing.

• Retry the request after a short delay. Twilio treats 503 as a temporary service unavailability and recommends trying again later.
• Check the Error Logs in the Twilio Console for the affected request, timestamp, and resource SID so you can confirm where the failure occurred.
• If this happens during WhatsApp sender creation or registration, set up an Alarm or Event Stream to track repeat failures and capture the error log details.

• Debugging Tools
• Senders API - WhatsApp