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API Endpoints

WAV Conversion

POST/v2/wav/generate

WAV Conversion Generate API

Create a WAV conversion task for one audio item from an existing music generation task.

POSThttps://udioapi.pro/api/v2/wav/generate

tips

Use the task_id returned by your music generation request and the selected result's audio_id.

The returned wav... task ID is the only ID used for polling, logs, and webhooks. Poll every 5-10 seconds.

requestHeaders

namerequireddescription
nameAuthorizationrequiredyesdescriptionBearer API key used to authenticate and scope the task to your account
nameContent-TyperequiredyesdescriptionJSON request body

requestBody

Source music task, selected audio item, and an optional webhook destination

commonParams

paramNameparamTyperequireddescriptionexample
paramNametask_idparamTypestringrequiredyesdescriptionYour Udio API music generation task IDexamplegen2abc123def456bksv
paramNameaudio_idparamTypestringrequiredyesdescriptionAudio item ID from the source task resultexamplee231f197-6bcb-4d70-bb8f-749b7f3272b8
paramNamecallback_urlparamTypestringrequirednodescriptionHTTPS endpoint that receives the final WAV statusexamplehttps://api.example.com/webhooks/wav

responses

json
{
  "code": 200,
  "message": "success",
  "workId": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
  "data": {
    "task_id": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
    "status": "IN_PROGRESS"
  }
}
json
{
  "code": 401,
  "message": "No API key provided in Authorization header",
  "data": null
}
json
{
  "code": 403,
  "message": "You do not have access to this music task",
  "data": null
}
json
{
  "code": 404,
  "message": "Original music task not found",
  "data": null
}
json
{
  "code": 422,
  "message": "task_id and audio_id are required",
  "data": null
}
json
{
  "code": 500,
  "message": "Internal Server Error",
  "data": null
}

codeExamples

curl
curl -X POST "https://udioapi.pro/api/v2/wav/generate" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "task_id": "gen2abc123def456bksv",
    "audio_id": "e231f197-6bcb-4d70-bb8f-749b7f3272b8",
    "callback_url": "https://api.example.com/webhooks/wav"
  }'
javascript
const response = await fetch('https://udioapi.pro/api/v2/wav/generate', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    task_id: 'gen2abc123def456bksv',
    audio_id: 'e231f197-6bcb-4d70-bb8f-749b7f3272b8',
    callback_url: 'https://api.example.com/webhooks/wav'
  })
});

const result = await response.json();
console.log(result.data.task_id);
GET/v2/wav/status

WAV Conversion Status API

Fetch the current status and WAV result URL using the WAV task ID returned by the generate endpoint.

GEThttps://udioapi.pro/api/v2/wav/status

tips

Status values: IN_PROGRESS, SUCCESS, FAILED, ERROR.

This endpoint accepts only your Udio API WAV task ID. Provider task IDs are never required or returned.

requestHeaders

namerequireddescription
nameAuthorizationrequiredyesdescriptionBearer API key used to authenticate and scope the task to your account

requestParams

paramNameparamTyperequireddescription
paramNametask_idparamTypestringrequiredyesdescriptionWAV task ID returned by the generate endpoint

responses

json
{
  "code": 200,
  "message": "success",
  "data": {
    "type": "IN_PROGRESS",
    "task_id": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
    "audio_wav_url": "",
    "created_at": "2026-07-18 03:20:00",
    "updated_at": "2026-07-18 03:20:00",
    "error_message": null
  }
}
json
{
  "code": 200,
  "message": "success",
  "data": {
    "type": "SUCCESS",
    "task_id": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
    "audio_wav_url": "https://cdn.example.com/audio/converted.wav",
    "created_at": "2026-07-18 03:20:00",
    "updated_at": "2026-07-18 03:21:06",
    "error_message": null
  }
}
json
{
  "code": 200,
  "message": "success",
  "data": {
    "type": "FAILED",
    "task_id": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
    "audio_wav_url": "",
    "created_at": "2026-07-18 03:20:00",
    "updated_at": "2026-07-18 03:21:06",
    "error_message": "WAV conversion failed"
  }
}
json
{
  "code": 401,
  "message": "No API key provided in Authorization header",
  "data": null
}
json
{
  "code": 403,
  "message": "You do not have access to this WAV conversion task",
  "data": null
}
json
{
  "code": 404,
  "message": "WAV conversion task not found",
  "data": null
}
json
{
  "code": 422,
  "message": "task_id is required",
  "data": null
}

codeExamples

curl
curl -X GET "https://udioapi.pro/api/v2/wav/status?task_id=wav7f93c2a18d4e4d61b63d2fd142f31c90" \
  -H "Authorization: Bearer YOUR_API_KEY"
javascript
async function pollWav(taskId) {
  while (true) {
    const response = await fetch(
      'https://udioapi.pro/api/v2/wav/status?task_id=' + encodeURIComponent(taskId),
      { headers: { 'Authorization': 'Bearer YOUR_API_KEY' } }
    );
    const result = await response.json();

    if (['SUCCESS', 'FAILED', 'ERROR'].includes(result.data?.type)) {
      return result;
    }

    await new Promise(resolve => setTimeout(resolve, 5000));
  }
}
POSTcallback_url

WAV Conversion Webhook

When callback_url is provided, the final status is sent to that URL with the same WAV task ID used by the status API.

POSTcallback_url

tips

Return a 2xx response promptly. Delivery follows the existing single-attempt callback behavior.

The payload never includes the provider task ID or raw provider response.

requestBody

json
{
  "code": 200,
  "message": "success",
  "data": {
    "type": "SUCCESS",
    "task_id": "wav7f93c2a18d4e4d61b63d2fd142f31c90",
    "audio_wav_url": "https://cdn.example.com/audio/converted.wav",
    "error_message": null
  }
}

codeExamples

javascript
app.post('/webhooks/wav', express.json(), (req, res) => {
  const { type, task_id, audio_wav_url, error_message } = req.body.data;

  if (type === 'SUCCESS') {
    console.log('WAV ready', task_id, audio_wav_url);
  } else {
    console.error('WAV failed', task_id, error_message);
  }

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