How to Fetch the Official MP4 for a Suno Track from an API

If your app generates music, the next practical problem is usually distribution: you may have a song ID, but your UI, CMS, or social workflow often needs a shareable MP4 asset.

This guide shows a small but useful backend pattern: take a Suno-generated audio_id, call the Suno MP4 endpoint through Ace Data Cloud, and store the returned data.video_url for playback, publishing, or downstream processing.

The API in this document is intentionally simple. That makes it a good example of how to wrap a media-generation step with a clean service boundary: one input, one POST request, one output URL.

What you can do

The Suno MP4 API lets you obtain the official generated MP4 link for a generated music track.

The core details are:

• Endpoint: POST https://api.acedata.cloud/suno/mp4
• Request format: JSON
• Auth header: authorization: Bearer {token}
• Content header: content-type: application/json
• Accept header: accept: application/json
• Required body field: audio_id
• Output field to persist: data.video_url

The request body has only one input parameter:

{
  "audio_id": "275113ab-fe5c-4bca-a33c-0cca96b39fa6"
}

That simplicity is useful in production. You can treat MP4 fetching as a deterministic enrichment step after music generation: once a track has an official song ID, your worker asks for the corresponding MP4 and saves the returned URL.

How it works

A typical backend flow looks like this:

1. Your app already has a Suno audio_id from an earlier generation step.
2. A worker calls POST /suno/mp4 with that ID.
3. The API responds with success, task_id, trace_id, and data.video_url.
4. Your app stores data.video_url next to the track record.
5. The frontend uses that URL for preview, download, or a publishing workflow.

Here is the documented Python request:

import requests

url = "https://api.acedata.cloud/suno/mp4"

headers = {
    "accept": "application/json",
    "authorization": "Bearer {token}",
    "content-type": "application/json"
}

payload = {
    "audio_id": "275113ab-fe5c-4bca-a33c-0cca96b39fa6"
}

response = requests.post(url, json=payload, headers=headers)
print(response.text)

A successful response looks like this:

{
  "success": true,
  "task_id": "03ae7cca-c3a2-40a0-98b2-8f33426af438",
  "trace_id": "848d8d5a-d6bb-4e16-bb29-768c22cf1b3b",
  "data": {
    "video_url": "https://cdn1.suno.ai/275113ab-fe5c-4bca-a33c-0cca96b39fa6.mp4"
  }
}

The field you normally want is data.video_url. task_id and trace_id are also worth logging because they make support and debugging much easier if a job behaves unexpectedly.

A curl version for workers and scripts

For a small queue worker, cron job, or shell-based test, the same request can be expressed with curl:

curl -X POST "https://api.acedata.cloud/suno/mp4" \
  -H "accept: application/json" \
  -H "authorization: Bearer {token}" \
  -H "content-type: application/json" \
  -d '{
    "audio_id": "275113ab-fe5c-4bca-a33c-0cca96b39fa6"
  }'

If I were integrating this into a service, I would keep the function tiny:

def fetch_suno_mp4(audio_id: str, token: str) -> str:
    response = requests.post(
        "https://api.acedata.cloud/suno/mp4",
        json={"audio_id": audio_id},
        headers={
            "accept": "application/json",
            "authorization": f"Bearer {token}",
            "content-type": "application/json",
        },
        timeout=60,
    )
    response.raise_for_status()
    body = response.json()
    return body["data"]["video_url"]

This keeps the rest of your codebase from knowing about endpoint paths or response shape. The rest of the app only asks for an MP4 URL.

Where this fits in a real product

A common media app pipeline might have records like this:

{
  "track_id": "internal_123",
  "audio_id": "275113ab-fe5c-4bca-a33c-0cca96b39fa6",
  "title": "late night demo",
  "mp4_url": null,
  "status": "audio_generated"
}

After calling the MP4 API, update the record:

{
  "track_id": "internal_123",
  "audio_id": "275113ab-fe5c-4bca-a33c-0cca96b39fa6",
  "title": "late night demo",
  "mp4_url": "https://cdn1.suno.ai/275113ab-fe5c-4bca-a33c-0cca96b39fa6.mp4",
  "status": "mp4_ready"
}

That small state transition unlocks a lot of product behavior: a preview button in an admin panel, a scheduled social post, an export queue, or a download link in a user dashboard.

Practical implementation notes

Because the request has only one business field, most production issues will come from surrounding concerns rather than request construction.

First, validate that audio_id exists before sending the request. If your generation step is asynchronous, do not call the MP4 endpoint until the track has an official generated song ID.

Second, do not expose your API token in frontend code. Keep the authorization header on the server side and let your backend return only the MP4 URL or your own signed asset reference.

Third, persist the full response metadata somewhere useful. Even if your main table only stores mp4_url, logging task_id and trace_id gives you a clean audit trail.

Finally, make the function idempotent at the application level. If a track already has an mp4_url, your worker can skip the call unless you explicitly want to refresh it.

A small API, but a useful boundary

The nice thing about this endpoint is that it does not try to do too much. It converts one known identifier, audio_id, into one useful media asset, data.video_url. That makes it easy to test, easy to retry, and easy to fit into an existing media pipeline.

For the original field names and sample response, see the Ace Data Cloud documentation: https://platform.acedata.cloud/documents/suno-mp4-integration