create / extend / cover / remaster / add vocals / add instrumental

POST

https://api.musicapi.ai/api/v1/sonic/create

Unified endpoint for creating, extending, and covering music. The operation is determined by the task_type parameter.

Credits cost: 15 (older models) / 20 (newer models) per generation call. Older = sonic-v3-5, sonic-v4; newer = sonic-v4-5, sonic-v4-5-plus, sonic-v5, sonic-v5-5. Extend-type task types (extend_music) stay at 15 on every model, and concat_music costs 2.

Request

Authorization

Bearer Token

Provide your bearer token in the

Authorization

header when making requests to protected resources.

Example:

Authorization: Bearer ********************

Body Params application/json

{
    "task_type": "create_music",
    "custom_mode": true,
    "mv": "sonic-v4-5",
    "prompt": "[Verse]\nStars they shine above me\nMoonlight softly glows\nWhispers in the night sky\nDreams that only grow\n\n[Chorus]\nStarry night starry night\nLet your light ignite ignite",
    "title": "Starry Night",
    "tags": "pop, dreamy, emotional"
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location 'https://api.musicapi.ai/api/v1/sonic/create' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
    "task_type": "create_music",
    "custom_mode": true,
    "mv": "sonic-v4-5",
    "prompt": "[Verse]\nStars they shine above me\nMoonlight softly glows\nWhispers in the night sky\nDreams that only grow\n\n[Chorus]\nStarry night starry night\nLet your light ignite ignite",
    "title": "Starry Night",
    "tags": "pop, dreamy, emotional"
}'

Responses

🟢200success

application/json

Success

Bodyapplication/json

Example

{
    "code": 200,
    "task_id": "81ed9f60-56ae-48c1-9c46-33a8220dfca7",
    "message": "success"
}

Modified at 2026-07-31 11:21:59

Sonic Instructions

upload and extend music