Suno Voice Validation Phrase Callback

System will call this callback when Suno Voice validation phrase generation is complete.When you submit a validation phrase generation task to the Suno Voice API, you can use the callBackUrl parameter in /api/v1/voice/validate to set a callback URL. The system will automatically push the validation phrase result to your specified address when the task is completed.

Callback Mechanism Overview #

The callback mechanism eliminates the need to poll the validation phrase API for task status. The system will proactively push validation phrase results to your server.

Webhook Security

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:

Validation phrase generated successfully

Validation phrase generation failed

Errors occurred during validation phrase processing

Callback Method #

HTTP Method: POST

Content Type: application/json

Timeout Setting: 15 seconds

Callback Request Format #

When the validation phrase task is completed, the system will send a POST request to your callBackUrl in the following format:

Success Callback

Failure Callback

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "xxx_task_id_xxx",
    "validateInfo": "Harmonies fill the air with joyful melodies tonight",
    "status": "wait_validating",
    "errorCode": null,
    "errorMessage": ""
  }
}

Status Code Description #

code (integer, required) #

Callback status code indicating task processing result:

Status Code	Description
200	Success - Validation phrase has been generated successfully
500	Failed - Validation phrase 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 validation phrase task.

data.validateInfo (string) #

Validation phrase text. Returned when the validation phrase is generated successfully.

data.status (string) #

Current task status.

Status	Description
wait_processing	Waiting for validation phrase processing
processing_validate	Validation phrase is being generated
processing_validate_fail	Validation phrase generation failed
wait_validating	Validation phrase is ready and waiting for user verification
success	Task completed successfully
fail	Task 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:

Node.js

Python

PHP

const express = require('express');
const app = express();

app.use(express.json());

app.post('/suno-voice-validate-callback', (req, res) => {
  const { code, msg, data } = req.body;

  console.log('Received Suno Voice validation phrase callback:', {
    taskId: data.taskId,
    status: data.status,
    message: msg
  });

  if (code === 200 && data.status === 'wait_validating') {
    console.log('Validation phrase is ready');
    console.log(`Validation phrase: ${data.validateInfo}`);
  } else {
    console.log('Validation phrase generation failed:', data.errorMessage || msg);
  }

  res.status(200).json({ status: 'received' });
});

app.listen(3000, () => {
  console.log('Callback server running on port 3000');
});

Best Practices #

Callback URL Configuration Recommendations

Use HTTPS: Ensure your callback URL uses HTTPS protocol for secure data transmission

Verify Source: Verify the legitimacy of the request source in callback processing

Idempotent Processing: The same taskId may receive multiple callbacks, ensure processing logic is idempotent

Quick Response: Callback processing should return a 200 status code as quickly as possible to avoid timeout

Asynchronous Processing: Complex business logic should be processed asynchronously to avoid blocking callback response

Persist validateInfo: Save the validation phrase together with taskId so users can read the correct phrase

Important Reminders

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

The validation phrase should be shown to the user before submitting verification audio

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 Validation Phrase Results

Use the get validation phrase endpoint to regularly query task status. We recommend querying every 3-30 seconds.