17564: Webhook payload exceeds maximum size

Twilio completed the transcription, but skipped the status callback because the serialized webhook payload exceeded the 1 MB limit.

The transcription record itself is unaffected and still reports as completed. Unless you have set a conversationConfigurationId, only the status callback delivers the transcript content. If you haven't, you can't recover the content, because fetching a transcription returns its metadata and not the transcript.

• The transcription ran long and contains many sentences.
• The word-level details in the result exceed 1 MB when serialized.

• Set a conversationConfigurationId on your Transcription Configuration. This results in Twilio storing the transcript. When the callback isn't delivered, you can retrieve it. You can create a configuration with the Conversations API, in the Twilio Console, or through Conversation Orchestrator.
• Set this in advance for critical workloads. It can't be applied retroactively to a transcription whose callback has already been skipped.

• Receive transcription results with a webhook
• Transcribe a Twilio Recording