90028: Broadcast 'IdempotencyToken' is too long

Twilio returns this error when your broadcast request includes an IdempotencyToken value that exceeds the supported length for the request. Use a short, stable token so Twilio can identify retries without rejecting the payload.

• The IdempotencyToken value in your broadcast request is longer than the allowed limit.
• Your application generates IdempotencyToken values from long concatenated strings, serialized payloads, or other unbounded input.
• Your application does not validate the length of IdempotencyToken before sending the request.

• Replace the IdempotencyToken with a shorter value.
• Generate a compact identifier for IdempotencyToken, such as a UUID, instead of using the full request body or other long input.
• Reuse the same IdempotencyToken only when retrying the same request after a timeout or similar transient failure.
• Add input validation in your application so requests are rejected or corrected before they reach Twilio.

• Bulk Messaging API
• Messaging API Overview
• Debugging Tools