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 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

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

json

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

Failure Callback

json

{
  "code": 500,
  "msg": "Internal Error, Please try again later.",
  "data": {
    "taskId": "xxx_task_id_xxx",
    "status": "processing_validate_fail",
    "errorCode": 500,
    "errorMessage": "Failed to generate validation phrase"
  }
}

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

javascript

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');
});

Python

python

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/suno-voice-validate-callback', methods=['POST'])
def handle_callback():
    payload = request.json
    code = payload.get('code')
    msg = payload.get('msg')
    data = payload.get('data', {})

    task_id = data.get('taskId')
    status = data.get('status')
    validate_info = data.get('validateInfo')
    error_message = data.get('errorMessage')

    print(f"Received Suno Voice validation phrase callback: {task_id}, status: {status}")

    if code == 200 and status == 'wait_validating':
        print("Validation phrase is ready")
        print(f"Validation phrase: {validate_info}")
    else:
        print(f"Validation phrase generation failed: {error_message or msg}")

    return jsonify({'status': 'received'}), 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=3000)

PHP

php

<?php
header('Content-Type: application/json');

$input = file_get_contents('php://input');
$payload = json_decode($input, true);

$code = $payload['code'] ?? null;
$msg = $payload['msg'] ?? '';
$data = $payload['data'] ?? [];

$taskId = $data['taskId'] ?? '';
$status = $data['status'] ?? '';
$validateInfo = $data['validateInfo'] ?? '';
$errorMessage = $data['errorMessage'] ?? '';

error_log("Received Suno Voice validation phrase callback: $taskId, status: $status");

if ($code === 200 && $status === 'wait_validating') {
    error_log("Validation phrase is ready: $validateInfo");
} else {
    error_log("Validation phrase generation failed: " . ($errorMessage ?: $msg));
}

http_response_code(200);
echo json_encode(['status' => 'received']);
?>

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

Suno Voice Validation Phrase Callback ​

Callback Mechanism Overview ​

Callback Timing ​

Callback Method ​

Callback Request Format ​

Success Callback ​

Failure Callback ​

Status Code Description ​

code (integer, required) ​

msg (string, required) ​

data.taskId (string, required) ​

data.validateInfo (string) ​

data.status (string) ​

data.errorCode (integer) ​

data.errorMessage (string) ​

Callback Reception Examples ​

Node.js ​

Python ​

PHP ​

Best Practices ​

Troubleshooting ​