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POST
/
flowmusic
/
v1
/
extend
cURL
curl --request POST \
  --url https://api.ttapi.io/flowmusic/v1/extend \
  --header 'Content-Type: application/json' \
  --header 'TT-API-KEY: <api-key>' \
  --data '
{
  "clip_id": "<string>",
  "extend_from_s": 123,
  "extend_s": 123,
  "instruction": "<string>",
  "model": "Lyria 3 Pro",
  "title": "<string>",
  "seed": "<string>",
  "hook_url": "<string>"
}
'
{
  "status": "SUCCESS",
  "message": "success",
  "data": {
    "job_id": "job_id"
  }
}

Authorizations

​
TT-API-KEY
string
header
required

Please visit TTAPI Dashboard to obtain your API key.

Body

application/json
​
clip_id
string
required

Source music clip_id

​
extend_from_s
number
required

From which time point to extend the source clip, in seconds; cannot exceed source clip duration.

​
extend_s
number
required

Extension duration in seconds; maximum 327 seconds.

Required range: x <= 327
​
instruction
string
required

Edit instruction for extending music.

​
model
string
default:Lyria 3 Pro

Music model name, defaults to Lyria 3 Pro when empty

​
title
string

Title after extension.

​
seed
string

Random seed; used to reproduce or control generation results.

​
hook_url
string

Business callback URL after task completion; no callback push when empty

Response

Request successful

​
status
string
required
Example:

"SUCCESS"

​
message
string
required
Example:

"success"

​
data
object
required
Example:
{ "job_id": "job_id" }
Last modified on April 25, 2026