Troubleshooting Callback URL Errors for Transcription Services

Understanding Callback URL Errors

When using transcription services, callback URL errors can occur due to various reasons. One common issue is when the callback request cannot be delivered due to server-side problems. This guide will help you troubleshoot and resolve these errors effectively.

Common Callback URL Issues

• 413 Payload Too Large Error: This error occurs when the payload exceeds the maximum size allowed by your server. To resolve this, increase the maximum allowed payload size in your endpoint configuration.

• Generic Callback Endpoint: Using a generic callback endpoint can make debugging difficult. Consider including the request ID directly in the callback URL to easily identify which transcription the callback refers to.

Improving Callback Reliability

If you can’t increase the maximum allowed payload size on your server, you should consider switching from callbacks to webhooks instead.

Webhooks are more reliable because their payloads are much lighter, they don’t include the full transcription data.

Instead, you receive a short event notification, and you can then retrieve the complete transcription safely via the GET endpoint.

Benefits of using webhooks :

• Smaller payloads → fewer delivery failures (no 413 errors).

• Full visibility across the transcription lifecycle.

• Easier tracking and debugging of events.

Available webhook events :

• Webhook Created

• Webhook Success

• Webhook Error

For a quick setup, refer to the Webhook Quickstart Guide.

Manual Fetching of Transcription Results

If a callback fails, you can manually fetch the transcription results using the GET endpoint. This ensures you still have access to the necessary data.

Example:

curl --request GET \
  --url https://api.gladia.io/v2/pre-recorded/{transcription_id} \
  --header 'x-gladia-key: YOUR_API_KEY'

By following these steps, you can effectively manage and resolve callback URL errors in your transcription services.