System will call this callback when Suno Voice generation is complete. When you submit a self-built voice generation task to the Suno Voice API, you can use the callBackUrl parameter in /api/v1/voice/generate to set a callback URL. The system will automatically push the generated voice result to your specified address when the task is completed. Callback Mechanism Overview# The callback mechanism eliminates the need to poll the voice generation API for task status. The system will proactively push voice generation results to your server.
To ensure the authenticity and integrity of callback requests, we strongly recommend implementing webhook signature verification. See our Webhook Verification Guide for detailed implementation steps. Callback Timing# The system will send callback notifications in the following situations: Voice generation completed successfully
Errors occurred during voice generation processing
Callback Method# Content Type : application/json
Timeout Setting : 15 seconds
When the voice generation task is completed, the system will send a POST request to your callBackUrl in the following format: {
"code" : 200 ,
"msg" : "success" ,
"data" : {
"taskId" : "xxx_task_id_xxx" ,
"voiceId" : "voice_xxx" ,
"status" : "success" ,
"errorCode" : null ,
"errorMessage" : ""
}
} Status Code Description# code (integer, required)# Callback status code indicating task processing result: Status Code Description 200 Success - Voice has been generated successfully 500 Failed - Voice generation failed or internal processing error occurred
msg (string, required)# Status message providing detailed status description. data.taskId (string, required)# Task ID, consistent with the taskId returned when you submitted the voice generation task. data.voiceId (string)# Generated voice ID. Returned when the voice generation task succeeds. You can use this ID in supported Suno generation endpoints that accept voiceId. data.status (string)# Status Description wait_processing Waiting for voice generation processing processing_validate Task is being processed wait_validating Waiting for verification success Voice generated successfully fail Voice generation failed
data.errorCode (integer)# Error code. Usually null when the task succeeds. data.errorMessage (string)# Detailed error message. Usually empty when the task succeeds. Callback Reception Examples# Here are example codes for receiving callbacks in popular programming languages: Best Practices# Callback URL Configuration Recommendations
1.
Use HTTPS : Ensure your callback URL uses HTTPS protocol for secure data transmission
2.
Verify Source : Verify the legitimacy of the request source in callback processing
3.
Idempotent Processing : The same taskId may receive multiple callbacks, ensure processing logic is idempotent
4.
Quick Response : Callback processing should return a 200 status code as quickly as possible to avoid timeout
5.
Asynchronous Processing : Complex business logic should be processed asynchronously to avoid blocking callback response
6.
Persist voiceId : Save the generated voiceId together with taskId for future generation requests
Callback URL must be a publicly accessible address
Server must respond within 15 seconds, otherwise it will be considered a timeout
If 3 consecutive retries fail, the system will stop sending callbacks
Please ensure the stability of callback processing logic to avoid callback failures due to exceptions
Save the voiceId promptly after success, because it is required for later voice-based generation
Troubleshooting# If you do not receive callback notifications, please check the following: Network Connection Issues Confirm that the callback URL is accessible from the public network
Check firewall settings to ensure inbound requests are not blocked
Verify that domain name resolution is correct
Server Response Issues Ensure the server returns HTTP 200 status code within 15 seconds
Check server logs for error messages
Verify that the interface path and HTTP method are correct
Content Format Issues Confirm that the received POST request body is in JSON format
Check that Content-Type is application/json
Verify that JSON parsing is correct
Alternative Solution# If you cannot use the callback mechanism, you can also use polling:
Poll Voice Generation Results
Use the get voice record endpoint to regularly query task status. We recommend querying every 3-30 seconds. 