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POST
/
v1
/
music
/
generations
/
coverFlowMusic
curl --request POST \
  --url https://api.apimart.ai/v1/music/generations/coverFlowMusic \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "flowmusic",
    "clip_id": "abc123-def456",
    "instruction": "Rearrange this song in jazz style",
    "strength": 0.5
  }'
import requests

url = "https://api.apimart.ai/v1/music/generations/coverFlowMusic"

payload = {
    "model": "flowmusic",
    "clip_id": "abc123-def456",
    "instruction": "Rearrange this song in jazz style",
    "strength": 0.5
}

headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
const url = "https://api.apimart.ai/v1/music/generations/coverFlowMusic";

const payload = {
  model: "flowmusic",
  clip_id: "abc123-def456",
  instruction: "Rearrange this song in jazz style",
  strength: 0.5
};

const headers = {
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
};

fetch(url, {
  method: "POST",
  headers: headers,
  body: JSON.stringify(payload)
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));
{
  "code": 200,
  "data": [
    {
      "status": "submitted",
      "task_id": "task_01KWXVD0E653EZ9FWD2SD9NNB6"
    }
  ]
}
{
  "error": {
    "message": "strength must be between 0 and 1",
    "type": "invalid_request",
    "param": "",
    "code": "invalid_request"
  }
}
{
  "error": {
    "message": "Insufficient balance",
    "type": "invalid_request",
    "param": "",
    "code": "quota_not_enough"
  }
}
{
  "error": {
    "message": "Current group capacity is saturated, please retry later",
    "type": "rate_limit_error",
    "param": "",
    "code": "rate_limit_error"
  }
}
curl --request POST \
  --url https://api.apimart.ai/v1/music/generations/coverFlowMusic \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "flowmusic",
    "clip_id": "abc123-def456",
    "instruction": "Rearrange this song in jazz style",
    "strength": 0.5
  }'
import requests

url = "https://api.apimart.ai/v1/music/generations/coverFlowMusic"

payload = {
    "model": "flowmusic",
    "clip_id": "abc123-def456",
    "instruction": "Rearrange this song in jazz style",
    "strength": 0.5
}

headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
const url = "https://api.apimart.ai/v1/music/generations/coverFlowMusic";

const payload = {
  model: "flowmusic",
  clip_id: "abc123-def456",
  instruction: "Rearrange this song in jazz style",
  strength: 0.5
};

const headers = {
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
};

fetch(url, {
  method: "POST",
  headers: headers,
  body: JSON.stringify(payload)
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));
{
  "code": 200,
  "data": [
    {
      "status": "submitted",
      "task_id": "task_01KWXVD0E653EZ9FWD2SD9NNB6"
    }
  ]
}
{
  "error": {
    "message": "strength must be between 0 and 1",
    "type": "invalid_request",
    "param": "",
    "code": "invalid_request"
  }
}
{
  "error": {
    "message": "Insufficient balance",
    "type": "invalid_request",
    "param": "",
    "code": "quota_not_enough"
  }
}
{
  "error": {
    "message": "Current group capacity is saturated, please retry later",
    "type": "rate_limit_error",
    "param": "",
    "code": "rate_limit_error"
  }
}

Authentication

Authorization
string
required
All endpoints require Bearer Token authenticationGet your API Key:Visit the API Key management page to get your API KeyAdd it to the request header:
Authorization: Bearer YOUR_API_KEY

Request Parameters

model
string
required
Model name, must be "flowmusic" (case-insensitive)
clip_id
string
required
Unique identifier of the source music, from a successful task’s result.music[].clip_id
instruction
string
required
Cover editing instructionExample: "Rearrange this song in jazz style"
strength
number
required
Editing intensityRange: 0 ~ 1; higher values mean larger changes
title
string
Title of the covered music
seed
string
Random seed, used to reproduce results

Response

code
integer
Response status code, 200 on success
data
array
Array of returned data

Use Cases

Scenario 1: Rearrange the whole song in jazz style

{
  "model": "flowmusic",
  "clip_id": "abc123-def456",
  "instruction": "Rearrange this song in jazz style",
  "strength": 0.5
}

Scenario 2: Import external audio, then rearrange

First import external audio via Upload Audio to obtain a clip_id, then run the Cover:
{
  "model": "flowmusic",
  "clip_id": "1db3a20f-4ddc-44e8-8c9c-6c9093c16ffe",
  "instruction": "Turn it into jazz style",
  "strength": 0.6
}
Query Task ResultsCover rearrangement is an asynchronous task; a task_id is returned after submission. Use the Get Task Status endpoint to query generation progress and results. The Cover output is a new clip_id; use the new clip_id for subsequent operations.

Completed Task Result Example

Query response example (GET /v1/music/tasks/{task_id}):
{
  "code": 200,
  "data": {
    "id": "task_01KWXVD0E653EZ9FWD2SD9NNB6",
    "status": "completed",
    "progress": 100,
    "created": 1783413244,
    "completed": 1783413315,
    "actual_time": 71,
    "cost": 0.048,
    "credits_cost": 0.48,
    "result": {
      "music": [
        {
          "clip_id": "ef3d804e-fa97-402f-ba17-4ff08270159b",
          "title": "Untitled (Cover)",
          "duration_seconds": "178.03733333",
          "create_time": "2026-07-07T08:34:58.112190Z",
          "lyrics": "[Verse 1]\nWaking up to the morning light,\n...",
          "lyrics_id": "c302d603-81b6-552f-8122-e512928d6aa1",
          "lyrics_timing_markers": [[10, 12], [212, 36]],
          "audio_url": "https://cdn.apimart.ai/audio/flowmusic_ef3d804e.m4a",
          "wav_url": "https://cdn.apimart.ai/audio/flowmusic_ef3d804e.wav",
          "image_url": "https://cdn.apimart.ai/image/flowmusic_ef3d804e_cover.jpg"
        }
      ]
    }
  }
}