33004: Service is unavailable

Twilio returns this error when an IoT request reaches a service that is temporarily unavailable. This usually means the service itself, or a downstream dependency it relies on, could not process the request at that time.

• The Twilio IoT service handling the request is experiencing a temporary outage or degraded performance.
• A downstream service that your request depends on is temporarily unavailable.
• An active incident or a scheduled maintenance window is affecting the service or region handling your request.

• Retry the request after a short delay. This error is temporary and may clear once the service recovers.
• If you retry automatically, use exponential backoff so you do not send a burst of repeated requests while the service is recovering.
• Check the Twilio status page to confirm whether there is an active incident, degraded service, or scheduled maintenance affecting the platform.
• Create an Alarm for this specific error code so you can detect repeated failures quickly.
• If the error continues after the status page shows normal service, capture the Twilio-Request-Id response header and contact Support.

• API best practices
• Alarms
• Checking Twilio Service and API Status with the Status Page