ACE Step API
ACE Step is the most advanced open-source AI music model with 3.5 billion parameters, enabling users to generate high-quality music from text lyrics. We have retrained it for pop music and female vocals. In addition to providing an API, FoxAIHub also allows you to experience ACE Step directly on this page.
ACE Step music generator Free Online
ACE-Step API Document
Billing Rule
Each generate requestion returns 1 task id, and each task id can be used to query 1 song and 1 cover image. Each generate requestion costs $0.008.
How to use it ?
BaseUrl : https://api.foxaihub.com/api/v2
Headers Parameters
{"api-key": "Your API Key"}You can find your api key on the dashboard.
Submit generation task
Path: /acestep/task
Method: POST
Content-Type: application/json
HTTP Body
{"task_type": "generate","lyrics": "","tags": "pop, female vocals, drum & bass, piano","negative_prompt": "drum & bass","duration": 122,"seed": 759249325}| Parameter | Type | Required | Description |
|---|---|---|---|
| task_type | string | Yes | Generation task type, should be "generate" |
| lyrics | string | Yes | The lyrics for the song to be generated |
| tags | string | Yes | Music style tags, comma separated |
| negative_prompt | string | No | Tags to be avoided in generation, but now it doesn't works, so you send an empty string |
| duration | number | Yes | Duration of the song in seconds, from 0 to 240 seconds. If you set it to 0, it will be a random duration |
| seed | number | No | Same seed will generate the same song. If you set it to 0, it will be a random seed |
How to generate a intrumental music?
You can set lyrics to [instrumental] or [inst]
Response
{"success": true,"task_id": "0196ecef-1550-7000-b332-89ded5ca66db",}Get Results
Path: /acestep/task/{task_id}
Method: GET
Content-Type: application/json
Response
{"status": "completed","task_id": "0196ebe0-4afd-7000-9a7b-67cf208209fd","gen_params": {"seed": 0, "tags": "pop, female vocals, drum & bass, piano", "lyrics": "", "duration": 120, "task_type": "generate", "negative_prompt": "drum & bass"},"data": { "seed": 3842775294, "end_time": "2025-05-20T04:08:06.852Z", "audio_url": "https://cdn2.foxai.me/acestep-songs/0196ebe0-4afd-7000-9a7b-67cf208209fd.mp3", "image_url": "https://cdn.foxai.me/image_c5a29c236cb96c2a9e9365690ceec649.jpeg"},"created_at": "2025-05-20T04:07:47.000Z"}