Suno Voice Generation Callback

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.

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:

Voice generation completed successfully

Voice generation failed

Errors occurred during voice generation processing

Callback Method #

HTTP Method: POST

Content Type: application/json

Timeout Setting: 15 seconds

Callback Request Format #

When the voice generation 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",
    "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) #

Current task status.

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:

Node.js

Python

PHP

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

app.use(express.json());

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

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

  if (code === 200 && data.status === 'success') {
    console.log('Voice generated successfully');
    console.log(`Voice ID: ${data.voiceId}`);
  } else {
    console.log('Voice 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 voiceId: Save the generated voiceId together with taskId for future generation requests

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

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.